The James Webb Space Telescope is turning distant exoplanets from anonymous dots of light into worlds with weather, chemistry, and sometimes even hints of clouds. By dissecting the faint starlight ...

Astronomers have searched the skies for signs of extraterrestrial technology for decades. These searchers since 1960 have ...

Photosynthesis changed Earth in powerful ways. When photosynthetic organisms appeared, it led to the Great Oxygenation Event. That allowed multicellular life to evolve and resulted in the ozone layer.

For decades, the search for alien life has revolved around a narrow ring around stars where liquid water could exist on a planet’s surface. That “habitable zone” remains important, but astronomers are ...

In the long and hallowed history of flight, engineers are writing a new chapter. It’s a chapter that involves skies more distant than the stratosphere of our own world. Space flight designers today ...