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 Health and Body History Early exposure to air pollution could affect brain development and mental health later in life: new research Getty Images Matthew Hobbs, Sheffield Hallam University; Joseph Boden, University of Otago; Lianne Jane Woodward, University of Canterbury,… byMatthew HobbsApril 7, 2025