Orbital dynamics show that President Trump’s pledge to land astronauts on Mars couldn’t happen until 2029 at the earliest.

"It's been such a puzzle that there was liquid water on Mars, because Mars is further from the sun, and also, the sun was ...

A U.S. scientist searching for a civilization across 7 Earth clones circling the red dwarf star TRAPPIST-1 says its own alien ...

You may opt out at any time. Your guide to the most important world stories of the day Essential analysis of the stories shaping geopolitics on the continent The latest news, analysis, and data ...

As rebels encroached on the city, anxious residents met to discuss escape plans ...

There are major doubts regarding the impact of large data privacy fines on tech giants’ behavior, and regulators need to explore other avenues to prevent non-compliance ...