Remnants of Neanderthal DNA in modern genomes have long prompted questions about interspecies mating. Two studies shed light on when that occurred — and when ancient humans left Africa.
Weather permitting, the gas giant will not only be brighter than most other stars and planets in the evening sky, but it will also be visible all night long.
The next Artemis mission, which will send four astronauts on a flight around the moon, will be delayed until 2026, NASA announced. The program is already years behind schedule.
Global temperatures in the last two years have been higher than scientists anticipated. That may be because cloud cover has decreased, a study suggests.