Sorry. But that is not a Triceratops jawbone. It doesn't look like a ceratopsian jawbone at all. The jawbone looks mammalian. Clearly this is a jawbone of an extinct relative to the elephant, possibly a Mastodon. The author of the article have made a big mistake misidentifying the prehistoric elephant jawbone as a ceratopsian. Those who know dinosaurs like me, knows for the fact that ceratopsians have rows and rows of guillotine bladed teeth for mashing up tough plants. This jawbone has only one row of rounded like an elephant. Sorry but this is an elephant jawbone, not a ceratopsian jawbone.