The 2 Week Diet

Trilobites: Why Do Cracking Knuckles Make That Noise? You Might Need a Calculator

Researchers developed a mathematical model to test competing theories for what causes the popping sound that will either irritate you or signal relief.

Source: https://www.nytimes.com/2018/03/29/science/cracking-knuckles-mathematical-model.html?partner=rss

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