Physical activity, independent of diet, shifts the composition of bacteria in the intestines, spurring researchers to search for species that might provide benefits akin to working out.

The 12-year-long endeavor reveals Prometheoarchaeum as a tentacled cell, living in a symbiotic relationship with methane-producing microbes.

The genes promote the migration of endothelial cells outside of the uterus, a characteristic of both endometriosis and endometrial cancers, a study of mice and human tissue finds.

An Israeli lunar lander carrying the tiny animals crashed into the moon in April, and now scientists are trying to determine if the creatures are still alive.

The researchers aim to grow transplantable human organs from primate embryos.

A specific type of lung cell withstands flu infection by doubling down on DNA repair.

A new cryoprotectant safeguards frozen cells against degradation.

The latest restrictions require scientists to submit more comprehensive grant applications, and those applications will go through more stringent ethics reviews.