space
How We Could Find Aliens by Looking for Their Pollution

Remember chlorofluorocarbons, aka CFCs? The big, bad ozone-depleting pollutant 1) sticks around for tens of thousands of years and 2) is almost entirely man-made. That means if extraterrestrial life are anything like us, according to astrophysicists at Harvard, CFCs could be a key to finding aliens. Read More >>

environment
Four New Gasses Renew Man’s Brutal Attack on the Ozone Layer

Remember the hole in the ozone layer? It was the old environmental crisis, from before everyone got worried about carbon and the ice caps melting so the woolly mammoths would come back to life and eat us all. Well, the ozone layer's back on the doom list, as mystery new gasses appear to be peeling away one of the planet's protective atmospheric layers once more. Read More >>