Here's what happens to your knuckles when you crack them

2015-03-09 13:19:18 קטגוריה: חדשות ופוליטיקה מאת: Vox
One man cracked his knuckles in one hand for 60 years and not the other. Watch the video to see what he found out. Help us make more ambitious videos by joining the Vox Video Lab: There's a long-held myth that cracking your knuckles can damage your hands. The sound definitely might make people around you cringe, but what's making those noises, and is it actually bad for you? There's a space in your joints filled with synovial fluid, a liquid that reduces the friction in your joints when...

סרטונים אחרים מאת Vox