MinuteEarth

Why Don’t Sheep Shrink In The Rain? (2017x11)

Air date: Apr 26, 2017

Getting wet isn’t REALLY what makes wool shrink; it merely exacerbates the friction between the wool fibers, which is stronger in one direction than another, so when agitated in the washer or dryer, they migrate in relation to each other in a process called “felting.”