A genetic analysis sheds light on when the outbreak began, how the virus spread and where it may be going.

Gas-burning ranges, a significant contributor to indoor pollution, can produce and spread particularly high levels of some pollutants in smaller spaces.

Three long-running satellites will soon be switched off, forcing scientists to figure out how to adjust their views of our changing planet.

Thousands of Americans believe they experienced rare but serious side effects. But confirming a link is a difficult task.

All vaccines have at least occasional side effects. But people who say they were injured by Covid vaccines believe their cases have been ignored.

If successful, the Chang’e-6 mission will be the first in history to return a sample from a part of the moon that we never get to see from Earth.