Why Do Mosquito Bites Itch?

Mosquito bites are just as pesky as the bugs themselves! The second you feel relief from scratching the bite, all of the itchings comes back. It can be distracting during the day and even interrupt your sleep schedule at night. It’s not fair that such a tiny bite can cause such a big nuisance, right?…

How Do Our Bodies Move?

How is it that we’re able to move so freely and effortlessly without a conscious, concentrated effort? Your brain works in conjunction with your muscles, which in turn work with your skeletal bones to produce a wide variety of movements. The brain sends signals via the nervous system, including the spinal cord and nerves, to the muscles. The muscles then contract to create movement. Your…

What is common cold?

We’ve all had a cold at one point or another; it entails an uncomfortable cocktail of symptoms like sneezing, coughing and a runny nose. But why do we get colds? How do they work? A runny nose, scratchy throat, and nonstop sneezing — you can’t miss the signs of a cold. But mystery shrouds a…

Why do we need sleep?

Every creature needs to rest. Giraffes, little babies, elephants, dogs, cats, kids, koala bears, grandparents, moms, dads, and hippos in the jungle — they all sleep! Just like eating, sleep is necessary for survival. Researchers have also shown that after people sleep, they tend to retain information and perform better on memory tasks. Our bodies all require…

Why do joints pop and crack?

Do your joints make noise when you move? Knees, ankles, fingers, and shoulders can all make cracking or popping noise from time to time. While it may sound like something is terribly wrong with the joint, in most cases joint noise is nothing to worry about. For many decades, the physical mechanism that causes the cracking sound as…

Why does your hair turn grey?

As we get older, the pigment cells in our hair follicles gradually die. When there are fewer pigment cells in a hair follicle, that strand of hair will no longer contain as much melanin and will become a more transparent colour — like grey, silver, or white — as it grows. … People can get grey hair at any age. So, why do we get grey hair in the first place?…