Humanity is on the threshold of being able to detect signs of alien life on other worlds. By studying exoplanet atmospheres, we can look for gases like oxygen and methane that only coexist i... Read more
Not that long ago, the possibility of finding planets outside our solar system was merely theoretical. In 1995, astronomers began to be able to detect Jupiter-sized “exoplanets” by their gra... Read more
Image by Royalty-free image collection via Flickr The search for a second Earth gets serious IN THE 19th century astronomers spent a lot of time seeking shadows crossing the sun. They were s... Read more