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. Sometimes we ...

To some people it may have been just a small bone; a darkened and fossilized relic laying in a creek bed since the end of the last ice age. But thousands of years ago it was a part of one of the most ...

A variety of saber-toothed animals have evolved to fill different niches. Matt Celeskey / Charles R. Knight Public Domain / Juan Carlos Cisneros, Fernando Abdala, Tea Jashashvill, Ana de Oliveira ...