When someone stretches or bends their knuckle to crack it, they increase the space between the bones, which creates a drop in ...

A bit of relief, or maybe just a force of habit: We’re separating fact from fiction about what happens when you crack your knuckles and other joints. * It all has to do with the “synovial fluid” in ...

Cracking knuckles creates a gas cavity in fluid; it makes noise but causes no damage Nearly everyone who cracks their knuckles has heard the same warning at some point: keep doing that and your hands ...

Cracking your back can feel satisfying and relieve stiffness, but is it actually safe? Science shows that occasional back cracking is generally harmless, but frequent or forceful cracking may carry ...

Rachael has a degree in Zoology from the University of Southampton, and specializes in animal behavior, evolution, palaeontology, and the environment.View full profile Rachael has a degree in Zoology ...