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 History For the first time, scientists observed the ‘hidden swirls’ that affect the flow of sand, rocks and snow MeSSrro/Unsplash Itai Einav, University of Sydney What looks like ordinary sand, rocks or snow flowing in one direction… byItai EinavSeptember 1, 2025