The Discovery Channel's Shark Week got off to a less-than-stellar start this weekend with a two-hour piece devoted to Megalodon, a prehistoric giant shark that grew up to 60 feet (18 meters) long and had jaws powerful enough to crush an automobile. The only problem is that the show suggested these animals still exist, which is definitely not the case. Up to 70 percent of the audience may now think that Megalodon is not extinct, according to a poll from the Discovery Channel.
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