The Wall Street Journal @WSJ

Our ancestors first grew scalp hair to cool our growing brains. Now, researchers discuss how it happened, with implications for hair-loss treatments. https://t.co/QaWDX5P7G5

www.wsj.com

Hair Kept Our Ancestors’ Brains Cool—And Gave Them an Evolutionary Advantage

New research explains how scalp hair grows so long, and how its characteristics helped us thrive.