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

Scientists have solved the 200-year-old mystery of the location of a massive volcanic eruption that spewed such a large volume of gases that it blocked sunlight, making the sun appear blue. The 1831 ...

Anewly published study links a massive eruption on one of four aligned volcanoes on Simushir Island, a remote former Soviet military outpost, to a mysterious global climate cooling event that occurred ...

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 ...

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 ...