A few weeks ago, I reported the possible disappearance of the Yangtze River dolphin when Biological Letters published an article suggesting this may be the first human-caused extinction of a cetacean species. And would you know it, according to The New York Times, a baiji dolphin was filmed in the Yangtze River this very week. Good news for marine mammal enthusiasts everywhere. Then again, Bigfoot's sighted quite often too.