Scientists observe largest Mars-quake ever recorded

Scientists develop the largest, most detailed model of the early universe to date

NASA will use the metaverse to build VR scenarios for Mars missions The space agency partners with Epic Games to tap game developers.

I'm trying to wrap my head around this picture taken by Curiosity on Mars a few days ago. What could've caused this doorway looking cutout on the side of that hill? None of the rocks laying in front of it are symmetrical enough to fit.