I love taking selfies with my insect friends. They’re so tiny and look so different from me. But my friend Rich Zack told me that insects and humans have lots in common. He’s an insect scientist at ...

Imagine you are flipped upside down and standing on your head. After a few seconds, you would feel pressure in your head due to an increased blood flow. Humans and other vertebrates are known to have ...

If you jump out of bed too quickly, you might feel a bit light-headed. That's because when you're lying down, gravity causes your blood to pool in the lower parts of your body rather than in your ...