TED-Ed
The Science of Skin
Almost one fifth of your weight is in your skin, but why does it weigh so much? Viewers learn about the integumentary system and the many functions it performs constantly to keep them safe. Then, they answer multiple choice and...
Be Smart
Why Are Some People Left-Handed?
Most animals that show a paw preference are split 50/50 with half of the population preferring one side and the other half preferring the other, yet in humans only 10 percent are left-handed. The video explains what part of the brain...