Sign up for CNN’s Wonder Theory science newsletter. Now, nearly 200 years later, scientists have identified the “mystery volcano.” The eruption was one of the most powerful of the 19th century, spewing so much sulfur dioxide into the stratosphere that annual average temperatures in the Northern Hemisphere dropped by about one 1 degree Celsius. “The moment in the lab analysing …
Sign up for our free Health Check email to receive exclusive analysis on the week in health Get our free Health Check email Get our free Health Check email SIGN UP I would like to be emailed about offers, events and updates from The Independent. Read our privacy policy A team of researchers have helped solve the mystery over a …