Learn more about the shifts in weather that may arise thanks to a powerful El Niño this winter and what the impacts on North ...

Learn how H. pylori, HPV, hepatitis B and C, and the virus behind mono can lead to cancer, and how vaccines and treatment can ...

Learn about three symbolic glyphs painted in a cave in Mexico where people once visited to perform fire rituals for warriors.

Learn how reseachers are working to determine if a twist in the universe's oldest light is evidence of new physics or a ...

Learn how mosaic-floored banquet halls and stone benches are strengthening the case for a school where Aristotle may have ...

Learn more about what caused the decades-old spy satellite to break apart and why its debris could pose a threat to other ...

Meriwether Lewis died in October 1809. Most researchers claim that he took his own life, but some debate that he could have been murdered.