Scientists aren't exactly sure how a humpback whale ended up in an Amazon jungle. The 36-foot calf was found Friday on the Brazilian island of Marajo after people noticed vultures circling overhead. The whale, estimated to be around a year old, was lying around 50 feet from the ocean. Biologists speculate that it might have already been dead in the ocean when an unusually high tide could have sent the whale that far inland. It's also unusual, scientists say, because humpback whales don't normally travel that far north.