The Friends of Charles Darwin

Big Macs in Bejing, Wal-Mart stores across Brazil, The Simpsons in Arabic on Egyptian TV: Such is the homogenized nature of modern culture. But it isn't only human society that's becoming increasingly globalized. Biologists say wildlife, too, is growing more alike everywhere you go. Researchers warn that human impacts on the environment are fuelling the global spread of animals and plants, which are replacing regionally distinct species.