Recent observations suggest that scientists have identified potential microbial fingerprints in the atmospheres of other planets, raising intriguing questions about the possibility of alien life ...

Scientists have discovered unexpected water-ice clouds on a distant, Jupiter-like exoplanet, challenging current atmospheric ...

Tiny life forms adrift in alien skies might one day expose themselves through the faintest play of light. A new study suggests that airborne microbes could leave detectable spectral fingerprints in ...

Lenticular clouds have been known to put on some dazzling displays around here, and Tuesday night was no different. Marcy LaGagnier snapped these photos of a lenticular cloud display over the Cascades ...

These noctilucent clouds, reflecting light from the sun after sunset, have been visible in Martian skies for the past four fall seasons. Credit: NASA / JPL-Caltech / MSSS A rover got a new view of ...