A nearly complete skull unearthed decades ago in Arizona has given paleontologists their clearest look yet at Adelphailurus kansensis, an enigmatic felid species that inhabited North America more than 5 million years ago and occupied an early branch of the saber-toothed cat family tree. Life appearance of Adelphailurus kansensis based on the newly described material. Image credit: Jesús Gamarra. Adelphailurus kansensis is an early-diverging machairodontine...
