
Donald Pettit worked for seven months in space and came back to Earth on his 70th birthday, April 20.
Donald Pettit worked for seven months in space and came back to Earth on his 70th birthday, April 20.
NASA’s Chandra X-ray Observatory has detected a massive X-ray jet from quasar J1610+1811, 11.6 billion light-years away. The jet travels at nearly the speed of light, illuminating black hole behavior…
A new 2025 study published in Global Change Biology shows Earth’s oceans may have entered a dangerous acidification zone in 2020. As CO₂ emissions increase, marine ecosystems are degrading, threatening…