Dr. Goris Nazari PhD on Instagram: "What really happens when you crack your knuckles? - - - That pop isn’t bones grinding or joints breaking. - - It’s a pressure drop inside the joint that creates a gas bubble in the fluid. - - No, it doesn’t cause arthritis. - - Yes, that myth is dead. - - You can’t re-crack right away because the gas needs time to dissolve again. - - And it feels good because your brain gets a quick dopamine hit. - - - #cracking #bone #science #facts"

Land tycoon Sonic

Sonic's careful thinking

Sonic the Hedgehog loves cutting his hair