New simulations suggest that up to four of the solar system's rocky planets, including Earth and a long-lost world, once ...

"The consequences, should the hypothesis turn out to be correct, could potentially be dire for humanity," said Avi Loeb.

Scientists are racing to learn as much as possible about the interstellar comet 3I/ATLAS before it fades from view forever ...

In the past two years, without much notice, solar power has begun to truly transform the world’s energy system.