PhysOrg.com [USA], February 28, 2012
One of the most prominent features of life-size, museum models of
Tyrannosaurus rex is its fearsome array of flesh-ripping, bone-crushing
teeth. Until recently most researchers only noted the varying size of T.
rex's teeth when they studied the carnivore's smile. But now a
University of Alberta paleontologist has discovered that beyond the
obvious difference in size of each tooth family, there is considerable
variation in the serrated edges of the teeth. These varying edges or
keels not only enabled T.rex's very strong teeth to cut through flesh
and bone, the placement and angle of the teeth also directed food into
its mouth.
http://www.physorg.com/news/2012-02-rex-killer-revealed.html
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