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Archaeologists and geneticists are looking at how human hair, and its countless hair types, evolved over millennia. Their research could shed light on the habits of our ancestors.
BIOLOGY
All of your blood vessels laid end to end would circle the Earth 4 times. Read on for more amazing tidbits about the human body.
The 3D-printed sushi at Sushi Singularity will be custom-built around your biological data. To get it, the restaurant will ask you to mail a saliva, urine, or feces sample before your meal.
Sleep might help the brain clear out and reorganize information. You might be surprised at what else you're doing while zonked.
The warty comb jelly forms an anus only when it needs to defecate, and it may hold clues to how the anus evolved millions of years ago.
Saliva is more important than you think: You need spit to taste, chew, swallow, and digest everything you eat. Your spit even fights tooth decay and cavities.
Ancient Romans put it in everything—even their wine.
