Whether you need to brush up on your chemistry, or just love it when someone sets the Periodic Table to music, AsapSCIENCE's The NEW Periodic Table Song is for you.
The average human body is covered in millions of hair follicles, and follicle density is particular dense on the head. Whether those follicles are actively pushing out medulla, cortex and cuticle, however, is another story entirely.
Why do our faces go red and hot when we feel embarrassed, ashamed or guilty? No other species is known to do this, and yet most humans can recall experiencing something that made them blush at one time or another.