NASA’s Perseverance rover had been on Mars for almost a thousand days when it spotted the odd-looking boulder on March 11.

While visiting a remote prehistoric site in the southern Philippines, a group of scientists realized they weren’t alone. A ...

View the most popular Photo of the Day images from 2012, featuring a house perched on a rock in the Drina River, a storm chaser in action, waterfalls in Iceland, orphan elephants in Kenya ...