Sharks in the Bahamas have tested positive for cocaine, a new study concludes. Researchers from the Bahamas, Brazil, and Chile also found traces of caffeine and painkillers in the sharks. This isn't a shift in lifestyle from the animals, but rather something that's being forced upon them, as marine pollution becomes ever more pervasive. Finding traces of these substances in a tropical place widely seen as idyllic and pristine is concerning – it seems there are vanishingly few spots on Earth