Sima Qian's calendar was considered revolutionary, setting 365.25 days to a year, and 29.53 days to a month The planet 12620 is named Simaqian in his honour Sima thought the purpose of history was ...

Mar. 27, 2025 — Scientists have uncovered a surprising role for calcium in shaping the building blocks of life. Their study reveals that calcium ions help determine the molecular 'handedness ...

Apr. 9, 2025 — A new study reveals the modern arid desert between Africa and Saudi Arabia was once regularly lush and green with rivers and lakes over a period of 8 million years, allowing for ...