An archaeological site in Germany suggests communal hunting and complex thinking emerged earlier in human evolution than once thought.

A blob of gas seen outside the Milky Way could be a type of starless, dark matter–dominated galaxy. Some scientists are skeptical.

Satellite data reveal a link between the amount of black carbon in the atmosphere and rates of Antarctic sea ice loss in recent years.

Solve our latest interactive crossword. We'll publish science-themed crosswords and math puzzles on alternating months.