Baby Chanco/Instagram. The baby whose mane made waves at 4 months is now 1 year old — and a hair model!The Japanese baby girl, Chanco, has amassed more than 300,000 followers on Instagram since ...

Would you believe that each one is smaller than the width of a human hair? And that’s only the beginning. Like Post-It notes and Play Dough before it, this new technology was a bit of an accident.

Among mammals, “we’re the only weirdos that are naked except for our head,” says biological anthropologist Tina Lasisi, who is studying the variation in human hair and how it evolved.