NASA's Perseverance rover has encountered another rock on Mars that has left scientists puzzled.

It is likely they all have masses less than Earth's. They're probably rocky planets, with bare-rock surfaces blasted by their ...

Martian Rock Analysis Reveals the Planet Had 'Secret Ingredient' That Was Ideal for Starting Life Planet Mars has always been ...

While the presence of these molecules is not proof of ancient life on Mars, scientists say it shows we could detect chemical ...

The intriguing chemistry of a rock collected by the Perseverance rover could trace to microbial activity — or not.

Every time a planet has been found orbiting its star that closely before, it has either been a huge gas giant, similar to Jupiter, or a barren tiny rock planet smaller than Earth. "We expect ...

Around 600 million years ago, Earth was home to strange, soft-bodied sea creatures, but a powerful asteroid impact in what is ...