A "bus-sized" asteroid being tracked by NASA will zoom safely past the Earth on Wednesday as both ... Do you have a tip on a ...

A trio of physicists, two with Coventry University, in the U.K., and the third with Laboratoire National des Champs ...

To put it bluntly, we know more about the curvature of Earth than almost any other topic in the realm of physical science. There are so many experiments, observations and demonstrations that have ...

If Earth's history were a calendar year, humans would not appear until the last few minutes before midnight on Dec. 31.

Bolivia’s Quebrada Honda Basin reveals ancient climate clues from 13 million years ago, offering insights for today’s climate challenges.

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Earth was a frozen wasteland. Then, rising CO2 caused a catastrophic thaw, turning Earth into a "slushy" planet.

Old or new, sedimentary or igneous, some of the Earth's crust drifts below the surface at subduction zones, where one continental plate overlaps another. When it does, some of it melts, eventually ...

For the believers and nonbelievers, the Pentagon answered whether UFOs or aliens have ever visited Earth ... fielded several questions from reporters on Thursday on topics such as the death ...