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Ancient marsupial sabertooth had eyes like no other mammal predator

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The “marsupial sabertooth” Thylacosmilus atrox had cow-like eyes and superlong sabers that went up into its skull, but it was still an exceptional hunter. (Image credit: Jorge Blanco)

Despite having eyes as wide-set as a cow’s and surprisingly long upper-canine teeth with roots tunneling deep into its skull, the “marsupial sabertooth” proved to be an effective carnivore, a new study finds.

This ferocious marsupial is an extinct mammal from South America scientifically known as Thylacosmilus atrox. Scientists from Argentina and the United States examined computed tomography (CT) scans of the skulls of three of the large predators, which would have weighed roughly 220 pounds (100 kilograms) and went extinct about 3 million years ago. The team noticed that the animal’s odd cranial anatomy stood out compared with other carnivores, such as dogs and cats, whose eyes are more forward-facing to help them track prey, according to the study published Tuesday (March 21) in the journal Communications Biology (opens in new tab).


The “marsupial sabertooth” Thylacosmilus atrox had cow-like eyes and superlong sabers that went up into its skull, but it was still an exceptional hunter. (Image credit: Jorge Blanco)

Despite having eyes as wide-set as a cow’s and surprisingly long upper-canine teeth with roots tunneling deep into its skull, the “marsupial sabertooth” proved to be an effective carnivore, a new study finds.

This ferocious marsupial is an extinct mammal from South America scientifically known as Thylacosmilus atrox. Scientists from Argentina and the United States examined computed tomography (CT) scans of the skulls of three of the large predators, which would have weighed roughly 220 pounds (100 kilograms) and went extinct about 3 million years ago. The team noticed that the animal’s odd cranial anatomy stood out compared with other carnivores, such as dogs and cats, whose eyes are more forward-facing to help them track prey, according to the study published Tuesday (March 21) in the journal Communications Biology (opens in new tab).

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