Illustration of NASA’s Perseverance rover ... Another possible theory is that Skull Hill is an igneous rock formed when lava or magma cooled, possibly millions or billions of years ago.

Because these crater floor samples came from igneous rocks forged in lava flows, they can help scientists understand the chemical composition of Mars’s interior, Wadhwa points out. That could ...

With the exception of "Editorial use only" photos (which can only be used in editorial projects and can't be modified), the possibilities are limitless. Learn more about royalty-free images or view ...

With the exception of "Editorial use only" photos (which can only be used in editorial projects and can't be modified), the possibilities are limitless. Learn more about royalty-free images or view ...