An unknown volcano erupted so explosively in 1831 that it cooled Earth’s climate. Now, nearly 200 years later, scientists have identified the “mystery volcano.” The eruption was one of the most ...

In 1831, somewhere on Earth's surface, a portal to the underworld appeared. A massive volcano opened wide its jaws and belched forth so much ash and smoke that the skies dimmed, cooling the Northern ...

This Cold War outpost concealed more than submarines—it hosted a devastating eruption that cooled the planet nearly 200 years ago. Reading time 2 minutes Scientists have finally solved a 200-year-old ...

Almost 200 years ago, the Sun looked as if it had turned a strange color, ushering in two years of freakishly cool weather across the globe. Scientists have long believed that the strange effect was ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. An unknown volcano ...