In a small study, mice given fecal transplants from elite cyclists and soccer players had higher levels of glycogen, a key energy source.

Many scientists say “subcritical” experiments and computer simulations make nuclear weapons testing unnecessary.

Astronauts Suni Williams and Butch Wilmore’s extended stay in the International Space Station will add to what we know about how space affects health.

GS-z13-1, marks the earliest sign yet spotted of the era of cosmic reionization at 330 million years after the Big Bang.

As 23andMe prepares to be sold, Science News spoke with two experts about what’s at stake and whether consumers should delete their genetic data.

A genetically modified mini pig’s liver was able to function in the body of a brain-dead patient throughout a 10-day experiment.

The iconic Cape Verde date palm came from commercial trees gone feral and could provide genetic variety to boost the resilience of its tamer relatives.

A dog's physical cues often take a backseat to environmental ones, skewing humans' perceptions, a small study suggests.

Carbon credits sold on the voluntary market are under scrutiny for not offsetting greenhouse gas emissions as claimed.

John Green’s new book, Everything Is Tuberculosis, reveals how social injustice sustains the disease, despite available cures and vaccines.

Mouse cells tweaked to produce the tardigrade protein incurred less DNA damage than unaltered cells — hinting at a new tool for cancer patient care.

A vaccine kept patients free of pancreatic cancer for years, yet new reports say the NIH is advising against mentioning mRNA tech in grants.