By —Annika Hammerschlag, Associated Press A microscopic marine organism responsible for producing one-fifth of Earth…

A total lunar eclipse seen in Australia in 2018.   (William West/AFP/Getty Images) The September 7-8, 2025 total lunar …

For many years, physicists dreamed of using the strange physics of black holes on our own planet. Now, that dream is b…

Unlike most other animals, humans are skilled at creating tools. Our apelike ancestors most likely used sticks to ca…

Scientists have been keeping a close eye on 2024 YR4, a space rock that has a higher probability of striking Earth in 2…

Astute skywatchers may have seen the spectacular line of planets across the night sky in January. This week, Mercury jo…

A speculative picture of Defaces 3.6 billion a long time back when an ocean may have secured about half the planet. Out…

Earth as seen in the first on-orbit photo released by the X-37B (left); the space plane prepares for its seventh missio…