A strange formation spotted deep within a massive Martian canyon is once again fueling debate over whether something more ...

But sometimes the most fascinating way to explore history is by asking a simple question: what if things had gone differently? Alternate history stories take familiar timelines and twist them, ...

There's more evidence that water once flowed on Mars with the discovery of an ancient river delta deep below the surface. NASA's Perseverance rover found it more than 35 meters beneath Jezero Crater ...

The new film probes the possibility of alien life – here's how the science of Project Hail Mary stacks up.