An iconic shot of Ed White during his historic first US spacewalk over New Mexico and southern California, June 3-7, 1965. The following is a transcript of the conversation between astronauts while ...

Footprints made tens of thousands of years ago may look like they’ve been erased by time and weather, but — like invisible ...

Earth's rocky layers are mysteriously low in nitrogen compared with carbon and argon. A scientific team explored our planet's molten youth using advanced quantum mechanical simulations, revealing ...

Astronomers have detected the most promising signs yet of a possible biosignature outside the solar system, although they remain cautious.

Founded by black artists and writers, Milestone devoted itself to black and multicultural stories. The comic Icon, for example, presents a Superman-like alien who arrives on Earth to find himself ...

Despite their brightness, even the largest black holes are tiny in the sky because they are so far away. From the vantage point of Earth ... director of the National Science Foundation, said ...