Why have Brazilian sharks tested positive for cocaine? - Al Jazeera English

1. Why have Brazilian sharks tested positive for cocaine?  Al Jazeera English
2. High Levels Of Cocaine Found In Sharks  The Weather Channel
3. ‘Cocaine sharks’ found in waters off Brazil  Science
4. Sharks test positive for cocaine in Brazil’s drug-polluted waters  The Washington Post
5. Not Afraid of Sharks? Well, Now They’re on Cocaine.  The New York Times

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