If you visit the George C. Page Museum in Los Angeles, where they display some of the interesting things that have been recovered from the adjacent La Brea Tar Pits, among the things you will notice are the dire wolf skulls. There were a lot of dire wolf skulls in the tar pits; thousands have been found so far. The dire wolf itself went extinct ten thousand years ago, but considering the extent of its former range, that likely has more to do with human predation than getting trapped in tar pits.
Though I notice now that these dire wolf skulls they've got on display, apparently with the lower jaws removed - they sort of look like fossilized prehistoric shoes.
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