Most Americans Don’t Care If People Around Them Mask In Public, Poll Finds

Rising income inequality linked to Americans' declining health

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.

Why human brains were bigger 3,000 years ago. Our modern civilisation may be the most advanced to ever exist on Earth, but around 100 generations ago, our ancestors had brains that were larger than our own.