Contrails, short for condensation trails, are the white streaks often seen in the sky behind aircraft. The International ...

From still lakes to shifting shores, waves play a bigger role than we think—even on worlds we’ve never directly observed.

New research suggests that many planets previously considered promising for life may, in fact, be far less hospitable. A ...

Contrails are created when airplanes fly in cold and humid atmospheric conditions and ice crystals form around the particles ...

Astronomers can use telescopes to find specific molecules in the atmospheres of neighboring planets, in nebulae—clouds of ...

For all the drama around getting to Mars, the harder question starts after landing. A person can step onto the planet with ...

A nearby Earth-sized planet offers a rare chance to study how atmospheres survive or disappear on rocky worlds.

Recent surveys hint that the rate of cosmic expansion changes dramatically over time; if that's true, then the universe could ...

For the first time, scientists have watched a subduction zone literally fall apart beneath the ocean floor. Using advanced ...

New data show that humans are continuing to make the climate crisis worse but there are some reasons for hope.

It's a big universe out there and if we have any neighbors, it might be better if they left us alone, and one pair of ...

Stand on the surface of Mars without a spacesuit and you would lose consciousness in roughly 15 seconds. Not because of the ...