Add Yahoo as a preferred source to see more of our stories on Google. A composite view of Mars taken by the Viking I and II probes. NASA/USGS In September, NASA announced the discovery of a possible ...

No one knows exactly what to expect if we encountered other forms of alien life. Would they talk like us? Look like us? Or would they be completely different? "What if, instead of encountering organic ...

Astronomers have spotted more than 100 new potential alien planets, including one in the fourth-closest star system to the sun, a new study reports. This haul of newfound possible exoplanets, which ...

On October 29, Comet 3I/ATLAS reached its closest point to the sun. Subscribe to our newsletter for the latest sci-tech news updates. This point, known as perihelion, was around 210 million kilometers ...