A Time Traveler’s Guide to Dinosaur Hunting brings cybernetic raptors, mutant T-rexes, and undead giganotosaurus to Dungeons ...

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Now, they were also really effective for biting, and they evolved multiple times as conditions ... too good at one thing just might lead to extinction. Jonathan Lambert, NPR News.

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.

Now, they were also really effective for biting, and they evolved multiple times as conditions changed ... tale of evolution - getting too good at one thing just might lead to extinction. Jonathan ...