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 5 minute read History Ice Age shelter high up in the Blue Mountains reveals Aboriginal heritage from 20,000 years ago Artist’s impression of Dargan Shelter as it would have looked during the last Ice Age. Painting by Leanne… byErin WilkinsJune 27, 2025