Scientists have discovered more than 6,000 planets beyond our solar system. What if some of them aren't planets at all, but ...
Remember when I warned everyone that humans would probably destroy all life in the universe like construction workers killing ant colonies to make way for a never-ending series of cosmic strip malls?
High in the Peruvian Andes, a serrated stripe of pits cuts across a barren hillside, so regular and extensive that early ...