Saber-tooth Kittens Were Big-boned

Saber-tooth kittens没有脂肪;他们是大骨架。and now we have the science to prove it.

If you've ever so much as touched a book about prehistoric mammals, then you know the saber-tooth cat (from the genusSmilodon) and its signature canine teeth. As Douglas J. Emlen points out in his book "Animal Weapons: The Evolution of Battle,"S. fataliswas smaller than a modern lion but twice as heavy. It even outweighed other Pleistocene wild cats, such as the American lion (豹属atrox). As such, these 600-pound (272-kilogram) cat-tanks probably depended on ambush tactics, leaping on the backs of lumbering prey animals such as young mastodons.

But what about saber-tooth kittens? Were they as massive and heavily framed as their parents? Scientists were unsure whetherS. fatalisentered the world thick-boned or developed its robust skeleton as it matured — until now.

In astudy publishedon Sept. 27 in PLOS ONE, California State Polytechnic University's Katherine Long and colleagues analyzed hundreds ofS. fatalisandP. atroxbones in theLa Brea Tar Pitsmuseum. Contrary to their expectations, the researchers found that baby saber-tooth cats were born thick-boned. They experienced more typical wild cat growth, with their already thick bones growing longer and slenderer as they matured.

So there you have it. Despite their unique and fearsome appearance, saber-tooth cats weren't that different from their feline relatives, at least as far as growth and development are concerned. Would they have also loved cardboard boxes and distrusted cucumbers? Sadly, such questions will have to remain a mystery.