Well, it’s a big bang of sorts. British scientists have a new theory about what killed the dinosaurs: flatulence. In a study, researchers found that the Jurassic beasts produced more than 530 million tons of methane gas a year—a byproduct of digestion. This amount, roughly the same amount of natural and man-made emissions in our society today, is enough to warm up the world. Who’s to blame? Probably those plant-eating sauropods, who ate about half a ton of ferns a day.