NASA’s newest space telescope rocketed toward orbit Tuesday to map the entire sky like never before — a sweeping look at hundreds of millions of galaxies.

Giant regions of the mantle where seismic waves slow down may have formed from subducted ocean crust, a new study finds.

We have discovered the oldest meteorite impact crater on Earth, in the very heart of the Pilbara region of Western Australia. The crater formed more than 3.5 billion years ago, making it the oldest ...