I missed this article, from last Wednesday, on research to make cows "spell relief" more like kangaroos.

SYDNEY (AFP) - Australian scientists are trying to give kangaroo-style stomachs to cattle and sheep in a bid to cut the emission of greenhouse gases blamed for global warming, researchers say. Thanks to special bacteria in their stomachs, kangaroo flatulence contains no methane and scientists want to transfer that bacteria to cattle and sheep who emit large quantities of the harmful gas.

A year ago Frank posted a relevant cartoon by Mike Lester on the Cattle-lytic converter.