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Dinosaurs 'gassed' themselves into extinction, British scientists say

Clash of the Dinosaurs

Mighty steps forward in computational power and computer-rendering ability allowed Discovery's artists to depict dinosaurs as never before, letting viewers see realistic skin and views deep inside their bodies, for the series "Clash of the Dinosaurs." (Discovery Channel)




'These dinosaurs may have produced more methane than all the modern sources put together.'

- Co-researcher David Wilkinson

Giant plant-eating sauropods were fingered as the key culprits in the study, which appears in the latest edition of the journal Current Biology. An average argentinosaurus, weighing around 90 tons (82 tonnes) and measuring 140 feet (42m), chomped its way through half a ton (half a tonne) of ferns a day, producing clouds of methane as the food broke down in its gut.

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The dinosaur output of 520 million tons (472 million tonnes) is comparable to current natural and man-made emissions of the greenhouse gas, which scientists say is around 21 times more powerful than CO2 at trapping heat on Earth and causing climate change. Cows and other farm animals globally contribute up to 100 million tons (90 million tonnes) a year of methane.