Many of the body's biggest flaws are the result of evolution building on old designs instead of starting over. Our spine, ...

Take an incredible journey inside the human body and discover how your brain, heart, blood vessels, red blood cells, and immune system work together every second. Discover how oxygen travels through ...

Add Popular Science (opens in a new tab) More information Adding us as a Preferred Source in Google by using this link indicates that you would like to see more of our content in Google News results.

Despite centuries of study, scientists are still finding new details and even overlooked structures within the human body. As researchers explore anatomical differences between individuals, it’s ...

Add Popular Science (opens in a new tab) More information Adding us as a Preferred Source in Google by using this link indicates that you would like to see more of our content in Google News results.

Regrowing a lost finger, hand or even an entire limb has long been considered impossible for humans.While salamanders and axolotls can regenerate limbs and some lizards can regrow their tails, mammals ...