For most of our evolutionary history, human activity has been linked to daylight. Technology has liberated us from these ancient sleep-wake cycles, but there is evidence sunlight has left and ...

This article is a continuation of last week’s story that looked at the evolution of human skin color. To review, the first humans had light skin that was covered in hair all over their bodies. These ...

A chameleon-like artificial skin can sense its local background and instantly change color in complex patterns to match and blend in (Nat. Commun. 2021, DOI: 10.1038/s41467-021-24916-w). While others ...

“Mommy, I have dark skin, and you have light skin,” said my 3-year-old daughter recently. I asked her where she learned that? She replied shyly, “my teacher.” As a parent who wants to instill ...