"Without Mars, Earth's orbit would be missing major climate cycles. What would humans and other animals even look like if Mars weren't there?" ...

When people think about habitats on Earth, they likely picture forests, oceans or grasslands. Few think to look up. Yet the lower atmosphere, or troposphere, may be the largest habitat on the planet.

WASHINGTON— Conservation groups today brought new legal claims in an ongoing lawsuit challenging the Interior Department’s ...

Tune in on Jan. 16 to bid farewell to interstellar comet 3I/ATLAS, courtesy of a livestream from the Virtual Telescope ...