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A new analysis suggests saber teeth were highly specialized for puncturing prey, ultimately at the cost of durability.

Its extinction around one million years ago marked the end of ... The fossils, include parts of whales, teeth from megalodon ...

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LAMBERT: Saber-toothed predators are now all gone, so saber teeth could represent a cautionary tale of evolution - getting too good at one thing just might lead to extinction. Jonathan Lambert, NPR ...

so saber teeth could represent a cautionary tale of evolution - getting too good at one thing just might lead to extinction. Jonathan Lambert, NPR News. (SOUNDBITE OF MUSIC) Transcript provided by ...

Saber teeth — the large canines — are pretty fearsome. These fangs have evolved at least five times in predators that are now extinct, but there's been something of a mystery as to why.