Biologists have long been fascinated by the ability of salamanders to regrow entire limbs. Now Harvard researchers have ...

Stem cells age faster and become functionally exhausted in low Earth orbit, making crewed long-duration space travel even more challenging. Human stem cells get worn out and age much faster in space, ...

Researchers have found that serum from younger blood can be combined with bone marrow cells and injected into older skin cells, producing rejuvenating effects. This is known as heterochronic ...