Extraterrestrial Life

Few flying cars and no fountains of youth: Since 2000 many old science goals have remained as far away as ET's signals

A wide range of organisms generate their own light to seek mates, sustenance and survival--inspiring researchers and moviemakers alike

A trio of studies presents evidence for the more elusive small planets orbiting nearby stars

For more than 40 years, missions throughout the solar system have sent back stunning images of our home planet

Saturn's icy moon Enceladus is an intriguing target for astronomers and planetary scientists—it is a small body whose surface fractures and fissures speak to ongoing geological activity.

Evolution helps us imagine what aliens might be like

In a study presented at the European Planetary Science Conference in Potsdam, researchers proposed that salt deposits on the early Earth's volcanic coasts enabled the conversion of amino acids into other important molecules for the start of life. Cynthia Graber reports

US radio array starts its search for extraterrestrial life.