“A Beard keeps you warmer”
In a crazy experiment to see if only shaving half his beard would indeed keep half his face warmer, Pete Hickey decided to concentrate his shaving efforts on just 50% of his face for 6 weeks.
His conclusions include:
“Yes, it does feel warmer with a beard.”
“At higher speeds, I found increased wind resistance on the side of my face with a beard.”
So there you go…that clears that one up! (via)