GEOLOGY

If you've wondered what the land underneath Antarctica's ice actually looks like, science has an answer.

In Northern Ireland, thousands of hexagonal stone columns of various heights rise out of the North Atlantic Ocean and climb up to the foot of a cliff, as if they had been placed by a massive mythical creature.

The biggest tsunami ever recorded reached 1720 feet high—which is taller than the Willis Tower in Chicago.

Many of the world’s biggest caves have been discovered just in the past few decades. Here are some of the most impressive.

The 555-carat black carbonado diamond is purported to be from outer space, though some experts are questioning its origin story.

The Appalachian Mountains occupy a towering spot in North American cultural identity, thanks in part to the Appalachian Trail. The rugged peaks have been influencing the continent for a lot longer than we’ve been around to appreciate them.

The metal known as pyrite fooled gold rush enthusiasts in the 1800s, but it turns out the material may contain gold after all.

When the Allison and Roberto Mignone Halls of Gems and Minerals reopen at the American Museum of Natural History on June 12, they will feature a new exhibit of animal-inspired jewelry.

Bermuda's red soil and the Bahamas's white-sand beaches might have come from the same place: the Sahara Desert.

Fear not: the chances of “The Big One” hitting while you read this article are very, very slim. But that doesn't mean you should let your guard down.

Research shows that a volcanic eruption in Alaska triggered a two-year cooling period in the Mediterranean—possibly destabilizing an already volatile Roman Republic.

Bombs were dropped near Hawaii's Mauna Loa volcano to divert the flow of lava in the 1930s and 1940s, and two devices that never exploded have just been discovered.