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PARIS - A survey of over 3,000 species has found that animal numbers have plunged by more than half in just 40 years as Earth's human population has nearly doubled, conservationists said Tuesday. Credit: Getty Creative From 1970 to 2010, there was a 39-percent drop in numbers across a representative sample of land- and sea-dwelling species, while freshwater populations dropped 76 percent, the green group WWF said in its 2014 Living Planet Report. All told, "the number of mammals, birds, reptiles, amphibians and fish across the globe is, on average, about half the size it was 40 years ago," it said. The 52-percent decrease confirms mankind is chomping through nature's bounty much faster...

PARIS - Chimpanzees can be lethally violent to each other but this stems from an inherent streak and not, as some have suggested, from human interference, a study said on Wednesday. Credit: Getty Creative Zoologists, led by the famed Jane Goodall, have speculated for years on the causes of "chimpanzee wars" among Man's genetically-closest relatives. One theory is that the apes are made more aggressive as a result of human influence: loss of habitat or food creates ever-greater competition for resources. But new research, published in the journal Nature, said coordinated violence by Pan troglodytes is an evolutionary strategy. Chimps kill to wipe out rivals, thus gaining territory,...