Scientists have advanced human-animal chimera research by successfully growing human cells within the organs of mice. This ...

Closer to the shoulder, axolotls have higher levels of retinoic acid, and lower levels of the enzyme that breaks it down.

Modern humans have existed for more than 200,000 years, and each new generation has begun with a single cell—dividing, ...

One of the great biological mysteries of the human body is how hundreds of complex, origami-like proteins, many of which are ...

Only a handful of stem cell therapies are currently approved by the F.D.A., mainly for treating blood cancer and immune ...

What if organ transplants effect more than just biological function? Research suggests transplanted pig organs could carry ...

Researchers have long known that glycosaminoglycan-binding proteins (HBPs) help control vital processes like cell growth, ...

Stanford scientists have successfully grown heart and liver organoids that include functioning blood vessels. This ...

A better understanding of how these amphibians grow new appendages may lead to better wound healing—or even new limbs—in ...