Learn why the lack of a single, standard definition of long COVID poses a problem for researchers and clinicians.

Learn more about the new species uncovered from the Permian Period and what they can tell us about the world during the Great ...

Learn about the extent of the Viking trade network as reflected in the Bedale hoard, containing silver from Western Europe ...

A traditional conch shell exercise is showing surprising benefits for people with obstructive sleep apnea.

Olympus Mons is the solar system's largest volcano. Astronomers say it holds clues to unraveling Mars' history.