LifeElephant shark takes record for slowest evolution The weird-looking elephant shark has hardly changed its genome in 400 million years, making it the slowest-evolving vertebrate yet 51¶¯Âþ
EarthFracking chemical leak kills threatened fish Chemicals used in the controversial gas extraction process spilled into a river in 2007, wiping out the local population of the vulnerable blackside dace 51¶¯Âþ