The Yangtze River dolphin is now almost certainly extinct, making it the first dolphin that humans drove to extinction, scientists have now concluded after an intense search for the endangered species.
The loss also represents the first global extinction of megafauna — any creature larger than about 200 pounds (100 kilograms) — for more than 50 years, since the disappearance of the Caribbean monk seal (Monachus tropicalis).
The Yangtze River dolphin or baiji (Lipotes vexillifer) of China has long been recognized as one of the world's most rare and
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