Leap seconds have helped keep clocks synchronized with Earth’s rotation, but their time is now over – here’s why
300 glaciers have disappeared from the American West since the mid‑20th century – the survivors have a few things in common
Read More 3 minute read Space Astrophysicists use ‘space archaeology’ to trace the history of a spiral galaxy This artist’s impression shows the spiral galaxy NGC 1365 colliding and merging with a smaller galaxy. Melissa Weiss/CfA… byLisa KewleyMay 14, 2026