RT @newscientist: Volcanoes plus an asteroid might have been the one-two punch that finished off the dinosaurs ow.ly/SVuzr http://t.co/MuNMHixwbR
RT @newscientist: Volcanoes plus an asteroid might have been the one-two punch that finished off the dinosaurs ow.ly/SVuzr http://t.co/MuNMHixwbR