A drowning cow was rescued from a river by a passing "mermaid" on a 200-mile swim of the Thames. Lindsey Cole splashed into the river in a wetsuit, tail and hat at Lechlade, Gloucestershire ...

A big six-cylinder engine running at 500rpm turns methane given off by decomposing cow manure into electricity. The process is called anaerobic digestion. In the absence of oxygen, microbes break ...