Water has some properties that can make it a good refrigerant. It also possesses some undesirable properties that makes its application as a refrigerant very challenging and inefficient to implement.
Learn some facts about common songbirds of Pennsylvania and view pictures to help you identify and attract the birds in your backyard.
Bootstrap modal box is very good option for building web application that require user interaction. It provide good experience to the user of your website.
What is the difference between tRNA and mRNA? How does a cell make only the proteins it needs?These questions are answered as we explore the stages protein synthesis - the process of Protein Production.
Exciting disciplines that combine biology and math include biostatistics, epidemiology, bioinformatics, mathematical biology, and population ecology. The disciplines offer interesting careers.
At least 1000 types of fish—and probably many more—produce sounds. These sounds include pops, clicks, purrs, grunts, hums, hoots, rattles, and tinkles.
It's not a dinosaur, whale, or giant deep-sea creature. In fact, the world's largest known living organism is an underground fungus that most people wouldn't notice even if it was right beneath their feet..
The deadly nightshade plant, or belladonna, is extremely poisonous. It contains atropine, which is potentially dangerous but has important medical uses.
Most commonly, you see brown, blue, or hazel eyes, but some people, whether it be luck or a medical condition, wind up with really cool and rare eye colors.
Test which surfaces create more friction, see how strong friction is, learn how to reduce friction, and even discover the side effects of friction. There are sliding friction experiments, a phone book friction experiment, a way to make rice stick together, an experiment to create frictional heat, and lots more friction experiments for all ages.
For some duckweed is a menace, for others it's a Godsend. Here in Brazil, we have built duckweed ponds and are encouraging it to grow to use as an animal feed . This is just one of its many uses.
When I meet someone for the first time, I always notice their eyes. Here are some cool facts about people with green eyes.
Green, huge caterpillars in Arizona gardens have many enemies not the least of whom are the gardeners. If these hornworm caterpillars survive and pupate, they become moths with hummingbird skills.
The Surinam toad has a strange, flattened body. During reproduction, the female’s skin absorbs the fertilized eggs and the young toads develop under her skin.
Who doesn't love oak trees? They're big, beautiful, useful, and can live for hundreds of years. Here's a list of some, with pictures of bark and leaf descriptions to aid in identification. Happy oak hunting!
Bone marrow is an essential tissue. It contains stem cells that produce all of our blood cells. Bone marrow transplants are used to treat some serious diseases.
When we think of the great predators of the animal kingdom, chimpanzees don't normally spring to mind. Yet, they are in fact among the deadliest predators on the planet. But how exactly do they catch and kill their prey?
There are so many different types of fungi in the world. Almost all of them are beneficial. Find out about them here and enjoy some beautiful pictures...
Destruction of our environment is the biggest contribution that we make to the extinction of many species in the forest. It is estimated that approximately half the number of world’s animals live in the rain forests. Due to the rapid disappearance of rain forests many animals living in them are now endangered. Every plant and animal needs an ideal environment where they can survive. No life can exist without proper and sufficient source of food, water and shelter. There should be a balance betwe
The orangutan is one of our closest relatives, and yet we know comparatively little about them. They are an animal, that we need to learn more about, because maybe knowing more about them will helps us understand ourselves better. Hopefully, we can do this before it's too late...
The notorious Ring of Fire, which runs all the way from New Zealand to Chile by way of the Aleutian Islands, is home to many of the most potentially destructive volcanoes on the planet.
Fun dry ice experiments. Make foggy bubbles, screaming metal, frost things over, pop the caps off containers, blow up a balloon, and more.
What are the differences between the three types of human muscles? Find examples and complete descriptions of cardiac, smooth, and skeletal muscles.
This hub is solely written bearing in mind helping school kids with their assignments. I have written down briefly with illustrations where possible, what mountains are, how they are formed, the types of mountains and how you identify the different types of mountains. I hope you enjoy reading this, and it helps you with your requirements.
A comparison of plant and animal cells using labelled diagrams and descriptive explanations. Learn about the similarities and differences between plant and animal cells as we compare and contrast.
The urinary system is the excretory system of the body. The nephron does all the work of the Urinary System. Find out how the nephron works.
Unique and rare Septarian brown stones among other types are found along a narrow stretch of Lake Michigan shorelines. Find out the one other place in the world they can be found.
In some of the driest regions on earth people are using low-tech nets to harvest droplets from mist and fog. This technique can bring fresh water to some of the world's most arid places.
We might not be able to clone dinosaurs but did you know we are looking into "reverse engineering" them? And cloning more recently extinct animals?
Here's a (non-comprehensive) list of ocean animals in alphabetical order. There's always more to explore!
Having a surgical biopsy taken can be traumatic. Waiting for results adds to the stress. Here is a step by step description of how biopsy tissue is processed in the histopathology laboratory.
If you were designing a bomb shelter to prepare for the end of the world, what kind of metal would you build with? Find the smartest answer here.
The banana spider is famous for its beautiful web, which appears to be golden when it shines in the sun. The spider's venom is of the same type as that of a black widow, but much weaker.
Since ancient times, the Moon has fascinated and inspired people. The Moon is often associated with magic and mystery. Now science has unveiled those mysteries. Ready for a moonwalk? Read on!
Although we often think all spiders make webs, the majority of spiders do not. Here are the four kinds that do not make webs.
Broca's area, Wernicke's area, and the circle of Willis are important parts of the brain. They are named after the famous scientists who discovered them.
Although human blood is usually red it may have a different color, which indicates the presence of a health problem. Animals have a wide variety of blood colors.
This article is about how the inner ear helps to maintain the balance and equilibrium of the body. Read on to know in detail about how the inner ear helps to maintain balance and equilibrium.
Top 10 Most Beautiful Animals In The World--These unusual species and wonders of evolution are illustrated with pictures and facts.
The heterozygote advantage is shown in several genetic diseases: cystic fibrosis heterozygotes are resistant to cholera, thalassemia trait confers a benefit for coronary artery disease.
Proteins in the body have essential jobs. They enable us to move, transport materials and signals, control chemical reactions, stop bleeding, and fight infections.
The marginal rate of technical substitution of Labor (L) for Capital (K) is the slope of an isoquant multiplied by -1. Since the slope of an isoquant is moving down, the isoquant is given by –ΔK/ΔL...
Cinnabar is a beautiful but toxic red mineral made of mercury (ll) sulfide. It’s used as a source of mercury and to make an artist's pigment called vermilion.
Elizabeth Kolbert's "The Sixth Extinction" won the 2015 Pulitzer for non-fiction, deservedly, for its blend of places, people, creatures and science. Get the gist in this lavishly illustrated Hub.
Do you understand your blood results? Why do doctors need to know what's in your blood? Read this article to find out - in language you can understand.
There are so many different types of crabs around the world. Find out more about these fascinating animals here.
This contains facts and information about the world’s most deadly animals on land, water, and air. Some are able to live symbiotically with humans while others are better left in the wild.
Sinkholes are scary and sudden. But are they really deadly? Is there anything we can do to prevent them? A look at recent US and Worldwide deaths, why sinkholes happen, and how to stop them.
The black widow and the brown recluse are the only two poisonous spiders in North Carolina. Good housekeeping can reduce the risk of being bitten by them.
Fun, fast and enjoyable science project for elementary or older. Step by step instructions and student sample experiment. Videos to learn more about chocolate.
Learn to identify songbirds by type and see pictures of common backyard birds. You might be surprised to discover how some of the birds you see in your garden and yard are related. They are all of the order Passeriformes, but then split into many different families.
Blood clotting or coagulation is a complex process that helps us survive when we're injured. Fibrin threads trap blood cells and stop blood loss.
The monkey puzzle tree is a very strange and interesting plant. It's native to South America but grows in parks and gardens in other areas as an introduced plant.
Biting Midges are notoriously difficult to eradicate, but there are steps you can take to minimize their impact.
Inky cap mushrooms become a black, inky liquid in order to disperse their spores. Some contain coprine, which increases the unpleasant effects of alcohol intake.
How to convert a hexadecimal to a decimal and a decimal to a hexadecimal without using any calculators or special knowledge.
Here's the old-fashioned way of using HTML and CSS codes to tile graphics side-by-side on a webpage. Handy for photo galleries, strips of buttons, or other kinds of images arranged in a grid.
A growth or a culture medium is composed of different nutrients that are essential for microbial growth—here are some that are used in microbiological laboratories.
The uses of math for the layperson are essentially endless. No matter whether you are a struggling student, a homeowner, or someone simply trying to lose weight, math is the universal language that has an something to offer everyone.
Buchholz relay is a type of protection relay universally used on all oil immersed transformers having rating more than 500 kVA. From this article its principle and working can be understood.
According to genetics, it is extremely rare, but still possible, for a black person to have blue eyes. This article will cover the science behind black people with blue eyes, and will provide some well-known examples.
This article suggests the biggest man-made environmental disasters in the history of the United States. These disasters may not have killed people, but they severely damaged the ecosystem and will cost millions of dollars to clean up.
If you are worried about the possible presence of dangerous sharks in British waters, you may feel somewhat reassured by how few there really are. Out of the 29 different types of sharks that have been spotted around Britain's coastline, there are only 7 potentially dangerous sharks, not including the great white whose sightings have never yet been confirmed, but are highly suspected of being present.
A straightforward guide to drawing graphs in KS3 and GCSE science coursework and exams. Points out common pitfalls and shows a step-by-step guide to drawing these mark-rich answers perfectly
Astronauts living on the International Space Station help with the study of human survival and endurance in space. The challenges they encounter are unique due to the lack of gravity that we take for granted on Earth.
The difference between the colossal and giant squid, the real sea monsters that spawned the kraken legend, is about more than just size!
Among natural hazards and disasters, earthquakes are the most dangerous and disastrous happenings on the earth's surface.
Green eyes are very rare. This hub will help explain some of the traits and factors that contribute to them.
The large or Malayan flying fox is one of the world's largest bats and has a wingspan of up to six feet. Its population is classified as Near Threatened by the IUCN.
Here are the tales of fifteen species that succumbed to anthropogenic extinction as a result of hunting or habitat destruction.
We experience many Boyle's law applications in real life every day. Most people don't know it, but an example of Boyle's law is responsible for every moment we are alive.
There are supposedly dozens if not hundreds of poisonous herbs that grow around the world. Doctors and pharmaceutical companies warn us about these herbs..yet some of these herbs are used in our meds.
A hydrate is a compound that absorbs water molecules and incorporates them into its structure. Inorganic, organic, and gas hydrates exist. The latter may become an important energy source.
What is a snake? Which snake is the most venomous or the longest? How can I identify venomous snakes in the US? These frequently asked questions (faqs) about snakes (and many more) are answered here.
The lion is a multi-cultural symbol of power and strength. But how much do we really know about them? Among the things we know well about them, is their hunting ability. This Hub explores the hunting behaviour of the lion in-depth...
This is a list of 27 basic pieces of laboratory equipment you would find in a general chemistry lab. Each is named, explained, and shown in a picture.
Tsunamis cause have whenever they hit - death, destruction and carnage. Find out the exact effects on land and in the sea.
If you found a black or dark-colored caterpillar, this quick and easy guide can help you identify it.
If you found a wiggly, green creature, this quick and easy guide to identifying 16 common green caterpillars can help you identify it and the moth or butterfly it will grow into.
A description of the historic oil drop experiment that was performed by Robert Millikan to determine the electrical charge of the electron. Included is a diagram of the apparatus used and a discussion of the forces acting on the oil droplets.
Examining what it means to have Irish blood, outlining where Irish DNA comes from and who are the closest genetic relatives of the Irish in Europe. Of interest to anyone with Irish ancestry who wants to understand their genealogy.
Intergalactic travel is being considered among scientists as the endurance of humans in space is researched. Inhabiting Mars may be the next step, but can we go even farther, considering requirements for human survival?
Australia has a reputation for being home to many of the world's most dangerous animals. Here is a top ten list of the most deadly.
Invertebrates are diverse forms of animals. Here are nine (9) major groups of invertebrate animals and the most common examples of invertebrates under each type. There are also pictures of different major groups of invertebrate animals.
If you see yellow garden spiders in your garden, don't squash them! Be thankful. Argiope aurantia are large, bright, beautiful and beneficial predators. They are also a sign of healthy garden ecology.
The Ethiopian wolf lives in Africa at high elevations. It's the most endangered member of the dog family, or the Canidae. The animal faces some serious threats.
Second Beach at Port St John's, South Africa, has earned the reputation of being the most dangerous beach in the world for shark attacks, after suffering 6 fatalities in just six years.
A fascinating look at the amazing hummingbird, one of nature's most beautiful creatures. The four most common hummingbirds found in Las Vegas and in the Mojave Desert.
Great wild mushroom photos! Learn why mushrooms and fungi are important and what they do in addition to providing food.
The base 16, hexadecimal numbering system is regularly used in computer coding for conveniently representing a byte or word of data. This guide shows you how to convert from hex to binary and binary to hexadecimal.
There are many endangered species, including the Siberian Tiger, elephants, leather-back sea turtles, snow leopards,
Snakehead fish are invasive species in North America. They are fierce predators and can breathe in air. They may be a serious threat to native wildlife.
The constellation Virgo is one of the oldest-named constellations. It has a great mythological history and hundreds of galaxies and "Messier" objects within its boundaries. Find out more about the "Diamond of Virgo" and the "Field of the Nebulae."
What role does water play in life and what would happen if we were to lose it or it didn't exist? There are already parts of the world where we can see how life would change, if there were no water. This article explores it further.
The astrolabe has been used by mariner's for centuries. Although its use has largely fallen by the wayside due the development of more sophisticated instruments such as telescopes and GPS, it is still an instrument worthy of study. Build your own simple astrolabe to determine your latitude as did the ancient sailors or use it in conjunction with trigonometry to determine the height of a very tall object!
Students have an excellent chance of doing well on a physics exam if they work efficiently throughout the physics course and follow some tips for writing exams.
We should be less concerned with being for or against wolves and more concerned with how humans and wolves can better coexist.
Science isn't confined to a lab - it is all around us. The 10 fun, cheap and easy experiments in this hub make great family projects. Above all this proves that science is fun - what other school subject helps you make slime and rockets!?
Did you know that wild ginseng root can actually be found right here in America's national parks and private woodlands?
The hull (or outerlayer) of a corn kernel is made up of mostly cellulose. Cellulose does not break apart easily when chewed, and we humans don't have the enzyme to break it down.
This article suggests a list of the thirteen greatest airplanes of all time, emphasizing the importance of each during its time and place in world history.
This guide shows you the math behind working out a bolt circle diameter (BCD) or pitch circle diameter (PCD) and gives tables you can use in your calculations.
A look at the diversity of Arizona's Coconino National Forest and some of the wildlife that makes its home there, in the northern part of the state, including the San Francisco Peaks near Flagstaff
Eurasian Eagle Owls have made a comeback in the UK. Discover some interesting facts about the Eagle Owl; behavior, reproduction, habitat and why the Eurasian may become threatened again.
Varanus salvator, the Asian water monitor, is one of the most accessible large lizards on Earth. If you know where to look, one can get up close and personal with these giants of the reptilian world
Bleach has potent antimicrobial properties and is also able to remove stains from fabrics. It has many uses, but it's potentially dangerous.
Is it possible to travel through time? Perhaps it will be in the future, but a lot of technological hurdles must be overcome before time travel can become a real possibility.
There are many extinct animals that once lived in the rainforest, and many more that are endangered. We, who have the best capability of protecting these animals, should take actions to preserve life.
Different Types of Stars in the Universe - Physical characteristics and images of the many different kinds of stars, from red giants to white dwarfs.
Find all about palm trees, how they grow, flower, fruit and the uses people make of these marvelous plants...
What are the most dreadful earthquakes of India. Below is the list of biggest earthquakes of India with images.
Tsunamis are a natural disaster with devastating effects. Here you'll find a detailed breakdown of what causes a tsunami, which is perfect for school projects and essay answers.
Osteoblasts and osteoclasts control the production and disintegration of bone and the amount of calcium released from the bones into the bloodstream.
This hub is all about calculating lottery probability or odds. In order to make it relevant, I decided to base it on the Grandlotto 6/55, the lottery game with the biggest prize money here in the Philippines. There will be two different cases in the hub: the probability of winning the game with all six numbers matching, and the probability of having n numbers matching.
Researchers are embarking on studies that show a correlation between the color and pattern of the human eye iris and personality and intelligence. What do your eyes tell the world?
This article looks at the basic similarities and differences between animal and plant cells, and the functions of different organelles, and how cells are adapted to perform certain functions.
Overuse of our groundwater resources has resulted in an ever prevalent problem of Earth fissures. As a property owner or potential buyer of land, there are several things you need to know about these large cracks in the ground in order for you to make an informed decision.
What separates human language from that of other animals. Can animal communication exhibit some of the qualities, such as displacement and dual patterning, which are said to set human language apart?
Everyone know about the physical differences between mean and women. But why are they different anatomically? The answer lies just below our skin in our blood and other cells in the body.
Chloroplast and mitochondria perform vital yet different functions in cells. This article goes over their key similarities and differences.
A handy guide for identifying various types of clouds including information on what makes clouds look different, which are responsible for storms, and how some clouds can help in predicting weather.
The rapid development of land for use by humans all over Asia poses a serious threat to many animal species, and many Asian governments do too little too late to protect their own environments.
Did you know that only 6000 snow leopards are surviving in the wild today? Read more than 50 facts about this amazing creature...
A set of fun experiments that teach kids the fun of chemistry and how to tell a chemical change from a physical change
Honey bees are complex and fascinating creatures. Here are 20 questions--with answers-- to help you understand honey bees and their place in our world.
It’s hard to make a true-color family portrait of the solar system. It turns out that most photos of planets aren’t true color! Here's my attempt, using the best NASA photos I could find.
Discover some of the theories and ideas of one of the most unique minds of our time: Stephen Hawking. This is also a brief biography and bibliography of that brave and original soul.
An awfully subjective topic, but take a look and see if you find something you never knew existed. Our solar system has plenty to look at.
The surface area of a triangular prism can be found in the same way as any other type of prism. All you need to do is calculate the total area of all of its faces.
Step by Step instructions for science experiment: Can seeds germinate in salt water? How much salt affects seed growth?
Evolution has produced a multitude of predators down the ages, but which were the deadliest of all time?
Gas is one of the three forms of matter. Every known substance is either a solid, liquid or a gas. These forms differ in the way they fill space and change shape. A gas, such as air has neither a fixed shape nor a fixed volume and has weight.
We've all experienced a short-term power outage, but what kind of problems would we have if the power was out for a week, or even longer? We depend on electricity for a lot more than lights and TV.
Bacteria have some amazing abilities. They can live in extreme habitats, produce light, communicate with each other, and act as predators and magnets.
The Sunshine State has all sorts of over-sized bugs and creep-crawlies. This article looks at the biggest spiders in Florida.
Hair color is primarily genetic, and red hair is caused by mutations in the MC1R gene. The gene for red hair also causes an increased sensitivity to sunlight and a reduced sensitivity to anesthesia. Contrary to internet rumors, redheads are not going extinct! Famous redheads include Queen Elizabeth I and Malcolm X.
Although cockroaches are often seen as disgusting creatures, there are a lot of fascinating truths and fun facts you still don't know about them. Learn more about this amazing creature here.
What are the most dangerous scorpions in the world? All of them look deadly, but there are only a few who can do any real damage. Here is a rundown of the deadliest scorpions in the world.
The oceans contain a vast variety of creatures. Here are some marine animals whose names span the alphabet from A to Z.
Commercial farming of one of the world’s most popular types of seafood is causing environmental degradation on a large scale and is a potential source of health issues.
To say there are quite a few different use of a coconut is a huge understatement, there are hundreds of uses of this fruit of the Palm Tree. Every part of the coconut and the tree has a purpose.
Volcanic eruptions are a stunning sight. But how do they happen? Learn more about the science of volcanoes and volcanic eruptions in this article.
Tiny microplastic particles are produced from plastic waste. The particles enter the human body in a variety of ways. Their effects on the body are unknown.
Cone snails use their venom to paralyze their prey. Although the venom is often dangerous for humans, it contains chemicals that have important medical uses.
IUCN has declared 418 animal species in the Philippines to be either vulnerable or endangered. This article lists the top 50 critically endangered animals in the Philippines.
Have you ever discovered a snake in the wilds of Indiana and wanted to be able to identify it? Use this dichotomous key, which includes the most common physical characteristics of adult snakes.
Plants have a reputation for being motionless, passive, and boring. These 20 plants challenge this mundane stereotype.
The Jerusalem cricket is an interesting insect with bizarre looks that can be pretty frightening, but as long as you don't provoke them unnecessarily, they won't bite - and they aren't poisonous.
Full instructions for Cupcake Baking Science Project which demonstrates the importance of different ingredients.
The great horned owl is an avian apex predator. Possibly this bird is the finest predator to have ever lived.
This guide to laboratory signs and their meanings has a detailed description to each sign and symbol, with photos. A must read for anyone working in a laboratory with hazard signs...
In this article, I give essential facts on six of the most dangerous snakes in Florida, all of which are venomous and can deliver potentially fatal snake bites. My list includes the southern copperhead, eastern diamondback, and the cottonmouth.
In this guide you will learn easy ways anyone can get started in bird watching and become a birder, even if they are a total beginner!
Hydrochloric acid is made in the stomach and is a helpful chemical. However, too much or too little acid or acid in the wrong place can cause problems.
Ballistics is a branch of mechanics which deals with the motion of projectiles launched into the air or space. Solving these type of problems involves using Newton's equations of motion
Saliva is made by salivary glands and has important functions. The glands may sometimes develop stones. In Sjogren's syndrome, insufficient saliva is made.
There are many reasons why mosquitoes bite some people and not others and this article will address several of those, such as the pests preferring blood Type O over all other types.
North America is home to four native species of wildcats. Learn more about the wildcats of North America with pictures and videos.
Landfills are the method of choice for disposing of the world's garbage. By means of a comprehensive chart, you will be able to learn about fifteen of the largest landfills in the world.
Who would win, the Livyatan (Leviathan) Melvillei, the massive predatory whale, or the Megalodon shark? Here's a look at what might have happened when these prehistoric sea monsters clashed.
Because caffeine is a substance used by the young and old in every country and on every continent, it affects billions.
There are four species of owls native to North Carolina. These owls and their distinctive calls are captivating creatures.
The dragon blood tree of Socotra Island has an unusual appearance. It secretes a red resin known as dragon's blood when its bark is injured. The resin is used in many ways. The island is home to other fascinating and often unique organisms besides the tree.
A collection of all the essential facts about the southern black racers snake. These snakes are non-venomous and common throughout the southeastern United States.
Which company or agency will do the most to cure neuromuscular diseases, war injuries, and diabetes in the 2010s?
How many eyes does a spider have? Why do they need so many eyes? Find these answers and see beautiful pictures of spiders' eyes.
This guide explains everything you need to know about circles, including calculation of area, segment area, sector area, length of an arc, radians, sine and cosine.
The human skeleton has vital functions. It provides support and protection, allows us to move, makes blood cells, and stores fatty acids and minerals.
The resins that some trees secrete when they're wounded can be useful for humans. Some are used as perfumes or medicines. Others have preserved ancient life forms.
Step-by-step instructions for 4 different science experiments using Skittles candies. Easy, quick and fun!
Mucus has vital functions, such as trapping germs in the airways, protecting the stomach lining from an acid attack, and lubricating the passage of materials through the digestive tract. Excess mucus can cause health problems, however. Mucus in the nose is often referred to as snot.
This article answer the questions: "What is Physics?" and "What are the branches of Physics?" Learn about what physics is and its many different branches.
The wood frog survives freezing. A study of its adaptations for survival may be helpful in understanding human health problems and in the use of organs for transplants.
Mudskippers are unusual fish that may spend more time on land than in water. They use their pectoral fins as legs and breathe through their skin as well as their gills.
While the fearsome great white shark can grow to a massive 20 feet, most are much smaller. But what is the biggest one ever found?
A mycorrhiza is a beneficial association between a fungus and plant roots. Mycorrhizal fungi often form a communication network between trees. Some produce truffles.
Fascinating facts and photos featuring the most common and some more unusual stones found along Lake Michigan's shorelines. Including various types of basalt, septarian brown stones, limestone, granite, gabbro, diorite, gneiss, schist, sandstone, silt stone, mud stone, geodes, chalcedony and agate.
Mechanics is a branch of physics which deals with forces, mass and motion with applications in engineering construction, the design of machines, ballistics and space travel.
The giant hogweed causes burns and blisters. Grapefruit juice interferes with many medicines. The chemicals that cause these effects are called furanocoumarins.
The dumbest smart jokes, the stupidest funny answers. These are the best of the worst math puns and wisecracks!
Article answering: Does having a blood transfusion change your DNA? Transfusion cannot change your DNA but bone marrow transplants can change your DNA. So, Does a blood transfusion change your DNA and if so, will it be for the worse? Doubtful. Will a blood transfusion change your DNA in future?