A NASA spacecraft that has been circling Mars for more than two decades recently spotted something it never has before in well over 100,000 orbits of the Red Planet. On a morning horizon ...

An increase in seismicity—marked by frequent tremors—was observed recently at Alaska's Iliamna Volcano, which last erupted in ...

It's by no means the only volcanic beach in Iceland, but the intricate hexagonal basalt columns formed along its edge and spiraling sea stacks jutting out from the ocean make Reynisfjara otherworldly.