Mankind may have unleashed the sixth known mass extinction in Earth's history, given the known species losses over the past few centuries and millennia, palaeobiologists have reported.
Source: http://www.cosmosmagazine.com/news/4110/has-earth%E2%80%99s-sixth-mass-extinction-already-arrived
Christina Applegate Christina DaRe Christina Milian Christina Ricci Chyler Leigh Ciara Cindy Crawford
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