I learned this today. Why do horses need horseshoes? They only need horseshoes if they are going to be walking on hard or rough surfaces for a long time. The hoof of a horse consists of several different parts. The part that we can see is called the wall. This is up to two centimeters […]
#281 Why do horses need horseshoes? Read More »
I learned this today. How does fly spray work? By blocking the insect from using its nerves to move its muscles. There are two kinds of fly spray. There are repellents, which are sprays you apply to your body to stop insects landing on you and biting. Then there are insecticide fly sprays that kill
#280 How does fly spray work? Read More »
I learned this today. How does a virus infect the body? By replicating itself inside the body’s living cells. A virus is not a cell. It is called a virion. A cell has a cell membrane, a nucleus, and cytoplasm. A virion doesn’t have any of that. It is made up of a set of
#279 How does a virus infect the body? Read More »
I learned this today. Mosquitoes come out at dusk and are active throughout the night because the temperature is lower than during the day, it is easier to find food, and there are fewer predators around. It is not true to say that all mosquitoes come out at night. There are more than 3,000 species
#276 Why do mosquitoes come out at night? Read More »
I learned this today. High energy radiation or long exposure to radiation can damage the DNA in cells and cause radiation sickness. What is radiation? Radiation is energy that radiates from a source and travels through space at the speed of light. It travels as a wave or as particles and has an electric field
#275 How does radiation sickness happen? Read More »
I learned this today. Pandas eat bamboo because it is such an abundant food source that they don’t need to fight over food or search for it. There is some argument over when pandas started eating bamboo. The general consensus is that they began to eat bamboo about 6 million years ago. Evidence for this
#271 Why do pandas eat bamboo? Read More »
I learned this today. Vitamins are organic compounds that our bodies cannot produce on their own but that we need to live. Vitamins are organic molecules that we need in small amounts. They all serve different purposes in our bodies. There are 13 different vitamins. They are A, B1, B2, B3, B5, B6, B7, B9,
#268 What are vitamins? Read More »
I learned this today. Trees have rings because they do not grow through the winter when it is too cold. The study of tree rings is called dendrochronology. The word comes from ancient Greek: dendron means “tree”, khronos means “time”, and logia means “the study of”. So, it is the study of tree time. What
#263 Why do trees have rings? Read More »
I learned this today. Animals can sleep standing up by locking a set of muscles and tendons in their legs, using gravity to lock a joint, or using a flexor tendon. There are a lot of animals that can sleep while they are standing, but they can only do that through slow-wave sleep. To enter
#260 How do some animals sleep standing up? Read More »
I learned this today. Different species of extremophiles have evolved different ways to survive the extreme environments that they live in. The word extremophile comes from the Greek “extremus”, which means love and “philia”, which means love. They are organisms that not only survive in extreme environments they flourish in them. I learned about tardigrades
#237 How do extremophiles survive? Read More »
