by Mauro Pimentel Agence France-Presse A hoarse sound abruptly wakes visitors staying at a floating house that serves as a base for environmentalists on the Jaraua river in the Amazon rainforest. During flood season, the Mamiraua Sustainable Development Reserve — located 500 kilometers (310 miles) from the Amazonas state capital Manaus — fills with water. For researchers from the Mamiraua Institute and WWF-Brazil, that means their nearest neighbor is a caiman they call Dominique. It […]