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24 April 2014 11:45 am ,
Vol. 344 ,
Major climate data sets have underestimated the rate of global warming in the last 15 years owing largely to poor data...
The tsetse fly is best known as the vector for the trypanosome parasites that cause sleeping sickness and a disease in...
The National Institutes of Health is revising its "two strikes" rule, which allowed researchers only one chance to...
By stabilizing the components of retromers, molecular complexes that act like recycling bins in cells, a recently...
Fossil fuels power modern society by generating heat, but much of that heat is wasted. Semiconductor devices called...
Researchers are gaining insights into what made Supertyphoon Haiyan so powerful and devastating through post-storm...
Millions around the world got a first-hand look at what it was like to be in Tacloban while it was pummeled by...
- 24 April 2014 11:45 am , Vol. 344 , #6182
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ScienceShot: Why Wallabies Don't Pass Methane Gas
30 June 2011 2:00 pm
When cows digest food, they produce methane, a potent greenhouse gas, but when kangaroos chow down, their digestive tract is relatively methane-free. The difference comes down to one group of bacteria, new research suggests. Scientists studying wallabies, a smaller relative of kangaroos, isolated gut bacteria that they have now classified as Wallaby Group 1 (WG-1). When the researchers grew the bacteria in a nutrient broth, they found that the microbes produce a compound called succinate instead of methane as an end product of digestion. As succinate is not a greenhouse gas, the scientists hope that further studies on the WG-1 bacteria will help researchers find a way to modify livestock to produce less gas—methane gas, that is.
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