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 hedge bindweed produces large and beautiful flowers. It twines around other plants and sometimes interferes with their growth. It's invasive in parts of North America, including British Columbia.
With billions of galaxies in the universe, there is a vast potential for Earth-like planets with intelligent life. But here are the reasons why we may never find it.
Fibronectin attaches cells to the extracellular matrix and controls their behaviour. It also helps to stop bleeding and is used in a fetal fibronectin test.
African civets have some unusual features and interesting behavior. Unfortunately, they are kept in captivity on civet farms so that their musk can be collected.
The Himalayan blackberry is a beautiful plant in spring and summer. It produces delicious blackberries, but it's an invasive species and grows aggressively.
Solving triangles using Pythagoras's theorem, the cosine rule, the sine rule and various ways of calculating the area of a triangle.
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.
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.
Recent research has shown that four plant extracts inhibit the growth of some dangerous bacteria in the lab. Three of them may have been helpful during the American Civil War.
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 first of four basic guides to the night sky, and what can be seen with the naked eye or binoculars. This page identifies the many kinds of objects you can see when you look up at the night sky
Fishing cats are wild animals that feed primarily on fish and are at ease in water. Unfortunately, their population is in trouble due to habitat destruction.
The main difference between DNA and RNA is that the pentose sugar in the nucleotide of RNA is ribose while in DNA it is deoxyribose. RNA uses uracil as a base while DNA uses thymine. RNA is chemically less stable than DNA.
The crucifix frog has a cross pattern on its body. It lives mostly underground but emerges during the rainy season. It makes a sticky substance that may have medical uses.
The swell shark and the chain catshark produce beautiful patterns of light in a process called biofluorescence. The light emission may have important functions.
Horsehair worms are long and slender animals that writhe and form shapes resembling knots. One larval stage is a parasite that controls the behaviour of its arthropod host.
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 rhinoceros hornbill and the horned guan are interesting birds whose populations are a concern. They have a head ornament that is made of keratin and resembles a horn.
Exciting disciplines that combine biology and math include biostatistics, epidemiology, bioinformatics, mathematical biology, and population ecology. They offer interesting careers.
Some animals absorb chloroplasts or algae, which make food inside the animal's body. The exoskeleton of one type of insect makes electricity from solar energy.
Hydrochloric acid or HCl is made in the stomach. It can be a very helpful chemical. Too much or too little acid or HCl in the wrong place can cause problems, however.
Lichens are interesting organisms that are important in their environment and useful for humans. Some produce chemicals that are potentially dangerous for us, however.
Jackfruit trees produce huge fruits. Cacao seeds are used to make cocoa, but the trees are in trouble. Jackfruit seed powder may be a good substitute for cocoa.
Clostridium perfringens is a bacterium that is a common cause of foodborne illness. It might also cause some cases of multiple sclerosis via a toxin called epsilon.
In science, serendipity is an unexpected and beneficial event or discovery that seems to have occurred due to chance. I give some examples of serendipity in this article.
Asian and African golden cats are beautiful animals whose populations are near threatened or vulnerable. The animals are in trouble due to human activity in their habitat.
If you're a pet owner you'll be familiar with these pests. However, its not just our pets that ticks like to feed on.
Wolf spiders are great hunters. Some species live in the Arctic, where temperatures are increasing. Climate change may have many effects on the spiders and the ecosystem.
Prior to the discovery of blood groups, blood transfusions were often deadly. Physicians attempted the use of milk and animal blood as an alternative to human blood, but met with limited success: the discovery of blood types allowed modern transfusions to safely take place. Blood typing, blood groups around the world, and the genetics of blood types are discussed in this article.
Chloroform can act as an anesthetic, but it’s toxic and may cause serious health problems. It's present in the environment. Methods to limit our exposure to chloroform exist.
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.
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 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.
Stages in the Life Cycle of Stars - From protostars to white dwarfs, neutron stars, black holes and supernovae. The stages in stellar evolution are described.
Osteoblasts and osteoclasts control the production and disintegration of bone and the amount of calcium released from the bones into the bloodstream.
Mucus is a slippery liquid that has vital functions in our body. An excessive amount of mucus or a change in its appearance may indicate the presence of a health problem.
Western red cedar (or western redcedar) is a common and interesting tree in the Pacific Northwest region of North America. Historically, it was important in First Nations culture.
The gharial is a critically-endangered relative of the crocodile. It lives in and next to rivers in India and Nepal. The animal has some unusual and interesting features.
Saliva is made by salivary glands and has multiple functions. The glands sometimes develop a stone or an infection. In Sjogren's syndrome, insufficient saliva is made.
The maned wolf is an unusual animal with an erectable mane, a fox-like face, large ears, and long legs that resemble stilts. Its population is near threatened.
The dragon blood tree of Socotra Island has an unusual appearance. It secretes a red resin called dragon's blood when its bark is injured. The resin is used in many ways.
The pancreas makes an enzyme called trypsin. Once it has been activated, trypsin digests protein in the small intestine. If it becomes active in the pancreas, pancreatitis may develop.
The frilled shark is a strange, deep-sea fish. It has a wide head, a huge mouth, and a long, eel-like body. The fish is caught as bycatch in some areas, which is a concern.
A mycorrhiza is a beneficial association between a fungus and plant roots. Mycorrhizal fungi often form a communication network between trees. Some produce truffles.
Ferns are attractive plants with interesting features. They exist in both wild and cultivated forms. The western sword fern is a common plant in coastal British Columbia.
This is the third page in a series of guides for anyone who wants to learn a little more about our night sky. This page looks at those most numerous of all objects visible in the night sky - the stars
What are the most dreadful earthquakes of India. Below is the list of biggest earthquakes of India with images.
Shoebill storks, or shoebills, have a huge and very impressive bill. The animal's unusual features make it a unique bird. I describe 45 facts about the bird and its life.
Some heart transplant patients inherit character traits from their donors. Bacteria in the gut produce neurochemicals that help control basic physiological and cognitive processes. Science suggests that there are separate brains located both in the heart and gut that regulate emotion and intuition.
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 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.
Everywhere we turn during the spring season we are filled with awe just to see all the beautiful blossoms on the luxurious trees and showy shrubs! The following article features the most popular varieties with gorgeous photos along with interesting facts and growing tips. Be inspired!
This caterpillar identification guide is easy to use and accurate. Find out if your caterpillar is rare, or if it stings. Don't see your cateprillar here? Post it on my Facebook page, @caterpillaridentification. Thanks!
The monkey puzzle tree is a strange and very interesting plant that is endangered. It's native to South America but grows as a cultivated plant in other areas.
The beautiful spirit bear has a white or cream coat and lives in the Great Bear Rainforest of British Columbia. It's an unusual form of the kermode bear, which is a subspecies of Ursus americanus.
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.
Some chemicals found in fungi are used as medicines when formulated correctly. Examples include penicillin, lovastatin, and cyclosporine. Lentinan and eritadenine may be helpful as well.
Bumble bees have surprisingly capable brains. They can play a simple version of soccer and pull a string to get a reward. They may even experience optimism.
Nothing makes tourists whip out their cameras faster than seeing an unusual-looking animal on vacation. Getting up close and personal with furry friends we have yet to encounter is always a highlight. Here we present our list of 12 of the strangest-looking animals in the world.
Bacteriophages are viruses that infect bacteria. They don't infect our cells, but they're found in bacteria living in our gut. Here they may affect our lives.
Bees play a very important role in pollinating flowers, but the insects are disappearing. Pesticides may be at least partly responsible for this disappearance.
The deadly nightshade plant, or belladonna, is extremely poisonous. It contains atropine, a potentially dangerous chemical that has some important medical uses.
The Mariana Trench is the deepest place in the ocean and contains some fascinating animals. NOAA has made some exciting discoveries about life in the trench.
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.
Daffodils are beautiful and interesting flowers. They have some useful features but are also toxic. They are often used by cancer societies as a symbol of hope.
Horse chestnut trees are beautiful ornamental plants. They produce a nut-like seed called a conker that is used to play a traditional game known as conkers.
Staphylococcus epidermidis is a bacterium found on skin and mucous membranes. It's often harmless, but some strains have become resistant to antibiotics and may be dangerous.
Lobsters are interesting animals to observe and study in a natural setting. They are popular food items, but the way in which we kill them is controversial.
Learn some facts about the American Robin and its migration and behaviors, plus view pictures of this early bird of spring.
Our skeleton and its bones have vital functions. The skeleton provides support and protection, enables us to move, makes blood cells, stores minerals, and does many other jobs.
The giant hogweed causes burns and blisters. Grapefruit juice interferes with many medicines. The chemicals that cause these effects are called furanocoumarins.
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.
Land subsidence caused by groundwater withdrawal poses a significant threat to governments, businesses, and the general public.
Rediscovered by David Hudson, Ormus is an m-state element used by alchemists to revitalize the mind, body, and spirit. Ormus is used for health, anti-aging, meditation, and connecting to the divine.
The concept of emptiness in physics is enormous. There is mostly physical nothingness in the entire universe. Follow along with me as I explain this.
Spiders are fascinating animals that kill some types of harmful insects. Their silk is very strong and may be useful for humans. Certain species of spiders are venomous.
Dandelions have culinary benefits and also produce a latex that can be used to make rubber. This is potentially important, since the supply of natural rubber is decreasing.
Acanthamoeba is a microscopic, single-celled organism that can infect the cornea of the eye. It causes a disorder called Acanthamoeba keratitis, which is most common in contact lens users.
Stentor is an interesting, single-celled predator. At least one species makes relatively complex decisions. Studying it may help scientists understand the behaviour of our cells.
Inky cap mushrooms such as shaggy manes become a black, inky liquid in order to disperse their spores. Some contain coprine, which increases the unpleasant effects of alcohol intake.
While Power BI has the technology to allow users to import data from many data sources easily, many data analyst and business users don't realize that it is just as easy to export data from Power BI. I will show you how.
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.
All about the elusive, cute Dumbo octopus, which can be found in oceans around the world. Here is information about feeding, living environment and reproduction habits of this octopus.
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.
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.
The Y chromosome contains haplogroups which allow people to trace their family history, genes which control male development, and may actually be disappearing.
The Scottish wildcat is a beautiful animal and a powerful hunter. Unfortunately, it’s critically endangered due to hybridization with domestic cats.
Hercules beetles are named after the hero of ancient myths. The male has horns that may be very long. The insects can change colour and are found in both the old and the new world.
Tiny microplastic particles are created from plastic waste. The particles enter our body in multiple ways. Their possible effects are unknown but are a concern.
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.
Bacteria have some amazing abilities. They can live in extreme habitats, produce light or electricity, communicate with each other, and act as predators and magnets.
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.
Learn how bird feeders impact wild birds and the environment so you understand the good and bad aspects of feeding the birds in your garden or yard.
Orangutans are endangered, mainly because their rainforest habitat is being replaced by oil palm plantations. We can help the animals in multiple ways.