The structures at the bottom of this image that look like scales are actually bundles of muscles just under the skin of a rabbit. This image is a stained cross section taken under polarized light ...

Senescent skin cells, often referred to as zombie cells because they have outlived their usefulness without ever quite dying, have existed in the human body as a seeming paradox, causing inflammation ...

In the 1990s, a team led by MIT’s Leonard P. Guarente, Ph.D., experimented on yeast, more formally known as Saccharomyces cerevisiae. They identified an important set of genes involved in regulating a ...