New research suggests Earth was once a purple planet. Early microbes used retinal, not chlorophyll, for photosynthesis.

A new study rewrites the story of human evolution, suggesting that intelligent life is not rare but a natural planetary ...

Roughly 300,000 years ago, our species first appeared on the African landscape before spreading globally and coming to ...

On this day 35 years ago, NASA's Voyager 1 spacecraft took a picture that changed how we see our planet. The iconic "Pale ...

This week, see what makes loggerhead sea turtles “dance,” track a cosmic “ghost particle,” uncover an ancient basilica, and more.

YR4 has a 2% chance of hitting Earth in 2032. Astronomers are tracking it to refine estimates of its size and orbit to see how much of a risk the space rock poses.

It's a dark day for Super Earth. In a completely unexpected, unpredictable turn of events, the black hole that's occupied ...

A new study out this week said that the Earth's inner core is less solid than previously thought. Scientists still have ...

Seismic wave data previously suggested the Earth’s hot inner core is slowing its spin. Now, researchers say it’s also ...

Four planets will be widely visible to the naked eye through part of February, but calling them a 'planetary alignment' may not be the full picture.

The head of planetary defense at the European Space Agency discusses 2024 YR4, an asteroid with a small chance of striking ...

It measures 130 to 300 feet across, a pebble compared to the asteroid that killed the dinosaurs, which is estimated to have ...