Russian forces have used hypersonic missiles to destroy ground targets in their invasion of Ukraine—the first time such weapons have been used in combat—and a quantity of radioactive material has disappeared from a monitoring lab near the defunct Chernobyl Nuclear Power Plant. On March 19 Russian defence ministry spokesman Majorread more

A massive impact crater the size of the city of Paris that was discovered in 2018 under Greenland’s Hiawatha Glacier has been found to be much older than originally anticipated—tens of millions of years older, in fact. Initially thought to only be between three million and 12,000 years old, new datingread more