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 4 minute read History 12,000-year-old rock art marked ancient water sources in Arabia’s desert Sahout Rock Art and Archaeology Project Maria Guagnin, University of Sydney; Max Planck Institute of Geoanthropology; Ceri Shipton,… byMaria GuagninOctober 7, 2025