Now, researchers suggest these mysteries could point to the existence of an undiscovered Earth-like planet. Decoding the ...

Data from NISAR will improve our understanding of such phenomena as earthquakes, volcanoes, and landslides, as well as damage ...

Hot spots and tunnels to neighboring "superbubbles" seem to have been created by supernovas and infant star outbursts.

The oldest surviving world map, known as the Imago Mundi, offers a fascinating glimpse into ancient Babylonian life. Dating ...

Carl Sagan explained the thought process of the ancient Greek scientist Eratosthenes, who determined the circumference of the Earth.