The comet is now racing away from the sun following a close flyby on Jan. 20.

In the whole history of Earth's climate, few events are as extreme as those that geologists call "Snowball Earth." ...

On Jan. 31, 1958, Explorer 1 became the first satellite launched by the United States. Its primary science instrument, a ...

Scientists at Stanford have unveiled the first-ever global map of rare earthquakes that rumble deep within Earth’s mantle rather than its crust. Long debated and notoriously difficult to confirm, ...

With an estimated 6 sextillion kilograms of the stuff—that’s 21 zeroes by the way—the Earth’s core is another example of why hydrogen is the most abundant element in the universe.

NASA says Earth is about halfway through its lifespan. Scientists explain how solar changes could affect habitability, oceans, and the planet’s future over billions of years ...

“What keeps me up at night is the asteroids we don’t know about," said NASA's planetary defense chief.

The object is hurtling towards the Earth at a zippy 12,616 miles per hour, according to data from the space agency.

Key climate tipping points may be closer than expected, raising the risk of accelerating warming, sea-level rise, and ...