This article lists five fool-proof methods to help you memorize the elements of the periodic table, their chemical symbols, and their atomic numbers. Whether you're studying for a periodic table quiz or just a chemistry enthusiast, these methods will help you memorize the elements in no time!
With billions of galaxies in the universe there is a huge potential for Earth-like planets with intelligent life. But here are the reasons why we may never find it.
Antibiotic resistance is becoming a very serious problem. Phage therapy—treatment with viruses that attack bacteria—may be the solution.
Figuring out how the moon was created is one of the deepest mysteries of archeological astronomy. We do have ideas though...
The bunya pine produces huge and often very heavy cones. Its large seeds are both edible and tasty. The tree has a strange appearance and some unusual features.
The common raven is an intelligent and interesting bird that plays an important role in folklore. The bird is found in many countries and habitats.
Black widow spiders, scientific name Latrodectus mactans, are among the most venomous of all arachnids. I have been working with insects and spiders for almost 20 years and I get a lot of questions about black widow spiders. This article addresses all of your black widow concerns and curiosities.
Osteoblasts and osteoclasts control the production and disintegration of bone and the amount of calcium released from the bones into the bloodstream.
Honey bees are very smart despite having tiny brains. They can learn; they have good memories, and they can communicate using a unique symbolic language.
Bees play a very important role in pollinating flowers, but the insects are disappearing. Pesticides may be at least partly responsible for this disappearance.
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...
Some sharks produce beautiful patterns of light in a process called biofluorescence. The light emission may have important functions.
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.
The giant hogweed causes burns and blisters. Grapefruit juice interferes with many medicines. The chemicals that cause these effects are called furanocoumarins.
Acorn worms have an amazing ability to regenerate body parts. We have most of the worm's genes used in regeneration. Scientists hope to enable us to make new body parts.
Pygmy seahorses are tiny animals that are often less than an inch in length. Some have amazing features that disguise them and protect them from discovery.
Exciting disciplines that combine biology and math include biostatistics, epidemiology, bioinformatics, mathematical biology, and population ecology. The disciplines offer interesting careers.
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.
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.
The Sunshine State has all sorts of over-sized bugs and creep-crawlies. This article looks at the biggest spiders in Florida.
MFC Example that performs File Content Copy operation using Win32 API functions CreateFile, ReadFile and WriteFile
The Malayan tapir is an unusual animal with an extensible and mobile proboscis, or mini-trunk. Despite its size and bulk, this endangered animal can move fast.
Snakes are fascinating reptiles that have a wide variety of appearances and behaviors. Some snake characteristics are both strange and surprising.
The difference between the colossal and giant squid, the real sea monsters that spawned the kraken legend, is about more than just size!
Some people believe that NDE is proof of an afterlife. However, science provides alternate, and more plausible, explanations.
Narwhals are strange and fascinating Arctic whales. The males—and sometimes the females—have a very long tooth that grows through their lip, forming a tusk.
Some sunscreens contain tiny nanoparticles that may be detrimental to health. English ivy produces nanoparticles that may make a safer sunscreen.
Earwigs have a fearsome image but aren't dangerous. They sometimes become garden pests. Natural control methods can be very helpful in dealing with the insects.
Sickle cell disease is painful for sufferers and can sometimes be dangerous. Genome editing may one day correct the mutation that causes the disorder.
This article summarizes the threat that asteroids and comets pose to the Earth. A short history of some of the greatest asteroid impacts on Earth is also provided.
There are many endangered species, including the Siberian Tiger, elephants, leather-back sea turtles, snow leopards,
Irises are beautiful flowers that have a wide variety of colours. Some are used to make orris root, which has a lovely scent but can cause an allergic response.
Spiders both fascinate and frighten people. Check out these weird, amazing, interesting and fun facts about spiders taken from science, history, literature and mythology with cool photos and videos.
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.
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.
The great horned owl is an avian apex predator. Possibly this bird is the finest predator to have ever lived.
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.
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.
Rapamycin increases lifespan in mice, apparently by inhibiting a protein called mTOR. It may do the same in dogs and possibly in humans. It's currently being tested in pet dogs.
This simple emergency water filter is easy to make and could help save your life if you are ever in a survival situation.
Bacteria have some amazing abilities. They can live in extreme habitats, produce light, communicate with each other, and act as predators and magnets.
Tomatoes are nutritious fruits (or vegetables) with an interesting history, but they often lack flavor compared to tomatoes of the past. A discovery by scientists should be helpful in creating tastier fruits. Some strategies for obtaining tomatoes with a better taste already exist.
Bleach has potent antimicrobial properties and is also able to remove stains from fabrics. It has many uses, but it's potentially dangerous.
Zenos Paradox has been around since before Christ and has baffled many people. An explanation and debunking of the paradox; why it is no paradox at all but a simple mathematical description of what we see happening all around us.
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.
Bacteria in the genus Yersinia have major effects on our lives. One species causes bubonic, septicemic, and pneumonic plague. Others cause foodborne illness. One may eventually help to treat cancer.
Why does time only go forward? Is there some kind of gravity that relates to time? The gravity of time, or time gravity, is my theory that affects the direction of time—keeping it going only in one direction.
Learn some facts about common songbirds of Pennsylvania and view pictures to help you identify and attract the birds in your backyard.
In this example, we will create a c-sharp windows form which will Fade-out and get closed while user clicks the Close button.
Serendipity is a happy and unexpected event that seems to occur by chance. It's often called a “lucky accident”. Serendipitous discoveries are important in science.
Comets are astronomical phenomena that can both bedazzle and frustrate would-be viewers. Outside of the professional observatories, most people pay little attention. Amateur enthusiasts are a small part of the population.
The mathematical notion of "nothing" is actually quite enormous. There is more emptiness in the universe than there is physical substance. Follow along with me as I clarify this concept.
Saliva is made by salivary glands and has important functions. The glands may sometimes develop a stone or an infection. In Sjogren's syndrome, insufficient saliva is made. The disease may be accompanied by other symptoms.
Puss and saddleback caterpillars are attractive insects. Unfortunately, they can hurt us because they are stinging caterpillars. A sting may create relatively minor problems, but in some people the sting can cause serious and potentially dangerous symptoms.
Bowhead whales live in the Arctic, break through ice to breathe, and sing intriguing and beautiful songs. They have a large head with a huge, bow-shaped mouth.
Many slugs play a helpful role in their environment, although some are pests. Researchers are hoping to create useful items based on slug slime and movement.
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.
Pacific white-sided dolphins are intelligent and very social animals. This article describes the lives of the wild dolphins and of some rescued animals in captivity.
Octopuses have fascinating abilities. Some have fins that help them move. Others demonstrate intelligence. The genome of one species is very unusual.
The hedge bindweed or morning glory twines around other plants and interferes with their growth. Bindweed produces large and beautiful flowers in summer.
The Spix's macaw is endemic to Brazil but has been declared extinct in the wild. It still exists in captivity. Captive birds may be released into the wild, but it's unknown whether this will restore the population.
The rainbow eucalyptus is an unusual tree with a beautiful, multicoloured trunk. The trunk's colours change as the tree sheds strips of bark, creating living art.
Some animals absorb chloroplasts or algal cells, which make food inside the animal's body. At least one kind of animal can make electricity from solar energy.
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.
Our skin is an impressive organ that has many functions. For example, it reduces water loss, fights infections, helps regulate body temperature, and makes vitamin D.
Mole and worm lizards are very unusual reptiles. They have elongated bodies that resemble those of earthworms and have one pair of legs or none at all.
Coral bleaching is an event in which corals lose their pigment and main source of food. It often causes corals to die. Oxybenzone in sunscreens may contribute to coral bleaching.
Glaucoma is a vision problem caused by damage to the optic nerve. The pressure in the eyeball is often increased, but the disease is not fully understood. Recent research may change this situation.
Unripe lychees and ackee fruits contain toxins. Both fruits should be eaten only when ripe. In addition, it's very important that ripe ackee is prepared properly.
Formic acid is found in the sprayed venom of some ants and the secretions of some stinging nettles. The acid is dangerous at high concentrations but has important uses.
The mucus that covers fish has several functions, including protection from multiple dangers and serving as food for young fish. The substance may also be useful for us.
Proteins in the body have essential jobs. They enable us to move, transport materials and signals, control chemical reactions, stop bleeding, and fight infections.
There are 30 Night Sky Objects that are worth seeing either with our own eyes or through a telescope. Few items in this list include uncertain events like a naked eye comet or a Supernova that may never happen in our life time.
Goldfish are interesting fish that have some surprising features. The animals are popular pets. They are found in the wild, where they may become very large.
Some scientists are trying to bring extinct animals back to life through a process called cloning. The idea is exciting but also controversial.
Hoatzins are South American birds with some strange features. They digest their food in an unusual way and have an unpleasant smell. Their chicks have claws on their wings.
The frilled shark is a strange, deep water shark with a wide head, a huge mouth, and a long, eel-like body. It’s caught as bycatch and is near threatened.
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
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.
The safflower plant provides a useful vegetable and cosmetic oil and an attractive dye for textiles. A genetically engineered form of the plant can make insulin.
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.
Birds are among the most beautiful creatures on Earth. They're also some of the weirdest! Check out these crazy-but-true interesting and fun facts about our feathered friends...you'll be amazed!
Parkinson's disease is caused by the death of brain cells that produce dopamine. Stem cell technology may provide a more effective treatment than current methods.
African civets are interesting animals with some unusual characteristics. They are kept in captivity on civet farms so that their musk can be collected.
Asian and African golden cats are beautiful animals whose populations are near threatened. The cats are in trouble because of human activity in their habitat.
North America is home to six species of wildcats. Learn more about the wildcats of North America with pictures and videos.
Horsehair worms are long and slender animals that writhe and form shapes resembling knots with their body. They are parasites during part of their life cycle and at one point control the behaviour of their host.
Solving triangles using Pythagoras's theorem, the cosine rule, the sine rule and various ways of calculating the area of a triangle.
Exploring the phenomenon of people thinking animals are "sad" in zoos because of the expression on their faces. Can you read an animal's mind by looking at it?
Many people struggle to tell these two reptiles apart, but it isn't that difficult when you know what to look for. What is the difference between alligators and crocodiles? Well, there are essentially 8 main ways to tell them apart...
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.
A mycorrhiza is a beneficial association between a fungus and plant roots. Mycorrhizal fungi often form a communication network between trees. Some produce truffles.
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.
The deadly nightshade plant, or belladonna, is extremely poisonous. It contains atropine, which is potentially dangerous but has important medical uses.