Courtesy Public domainImagine you’ve been transported back in time to the Late Jurassic and you’re sitting on a gently sloping hillside watching a large herd of the gigantic sauropod dinosaurs chowing down on tons of vegetation in the valley below. What’s the one thing you might need to worry about? The herd of sauropods suddenly stampeding the hillside? A truck-sized carnivore eyeing you from the shadows? Tiny burrowing mammals gnawing at your ankles? While all these scenarios would have been possible, the most likely worry would probably be (if you’re downwind anyway) getting inundated by a warm blast of dinosaur farts.
That’s right, dinosaur flatulence - tons of it - wafting over you like a huge, stinky old blanket. Ewww.
Researchers from Liverpool John Moore's University, the University of London, and the University of Glasgow have calculated that herds of sauropods, those tiny-headed ,long-necked, long-tailed herbivorous dinosaurs that populated the Jurassic landscape about 150 million years ago, would have been eating a lot of vegetation during their lifetimes and in the process releasing a tremendous amount of methane gas from their guts and into the Earth’s atmosphere. That's a lot of cheese-cutting.
In fact, writing in the journal Current Biology, Dr. David Wilkinson and his colleagues claimed that the amount of emission of methane just from the herbivorous dinosaur gassers would have been about the same amount being emitted from all sources today - 500-520 million tons each year. Methane is a greenhouse gas that can absorb the sun’s infrared energy, and heat up the atmosphere. The producers of methane today range from ruminant species such as cows, goats, and sheep, and from human activities such as natural gas drilling, but the effects on the environment could be similar – a warming of the atmosphere. Back in the Mesozoic, average temperatures were about 18 °F higher than today. Wilkinson and his colleagues suggest the dinosaur backfires could have been a big factor in the warming of the prehistoric environment, but admit it wouldn't have been the only source of the gas back then.
"There were other sources of methane in the Mesozoic so total methane level would probably have been much higher than now," Wilkinson said.
Wilkinson’s research interest lays not so much in the sauropods themselves but in the microscopic bacteria that once lined their guts. It was these microbes that converted the vegetable matter into energy and waste, including methane. Could that vast SBD Mesozoic methane source, as the researchers suggest, have been a big contributor to the warmer temperatures back then? Possibly. Or maybe it's just a lot of hot air.
BBC Nature News
Darwin thought that our appendix was vestigial, a left over organ that no longer served any purpose. Now we know that the appendix can serve as a hiding place for good gut bacteria so they can replenish the colon after unpleasant circumstances like diarrhea or colon cleansing.
"Two years ago, Duke University Medical Center researchers said that the supposedly useless appendix is actually where good gut bacteria safely hide out during some unpleasant intestinal conditions." Scientific American