Why Do Dead Bodies Go Stiff?

Science Why Do Dead Bodies Go Stiff? Just a few hours after a person or animal dies, the joints stiffen and rigor mortis sets in for the next 72 hours. But what keeps the muscles fixed in place? READ NOW Advertisement READ THESE What Determines Muscle Strength? Is It Possible to Beat a Breathalyzer Test? Yes, Avocado Seeds Are Poisonous You are receiving this newsletter because you subscribed to the Today I Learned newsletter. If you wish to unsubscribe, please click here An About.com Brand 1500 Broadway, 6th Floor, New York, NY, 10036 © 2017 About.com - All rights reserved. Privacy Policy.