US president claims widespread and varied emergencies to justify executive authority in first year of second term.

The most important aspect of this is that, with a possible atmosphere and liquid water, this planet lies within the habitable ...

Interstellar object 3I/ATLAS has triggered a global scientific alert after emitting mysterious radio signals, prompting NASA ...

A rare visitor from deep space has swept through the inner solar system, offering astronomers a fleeting look at material ...

Unlike ʻOumuamua's eerie lack of coma or Borisov's more predictable gas cloud, 3I/ATLAS stayed stubbornly inert until late, ...

Radio signals have been travelling through space since 1906, forming Earth’s radio bubble. Now 119 light years wide, it covers about 75 star systems, the signals fading into noise ...

Planets orbiting two stars at once, a world that sparked debate over the possibility of life, and another being vaporized by ...

A federal judge has temporarily barred ICE from making arrests at immigration courts across Northern California.

When the three-million-year-old bones of Lucy were unearthed in an Ethiopian valley in 1974, paleoanthropologists anointed ...

Almost every week we hear of China trying a new trick to break free of the chip control that the US has imposed on it. But as ...

The Advanced Tactical Fighter competition is often remembered as a clean win for the F-22 Raptor, but the losing prototype, Northrop’s YF-23, has only grown in stature with time. As air combat shifts ...

For the first time in the history of observations, astronomers have recorded the merger of three galaxies, each of which ...