Simbakubwa kutokaafrika, a gigantic mammalian carnivore that lived 22 million years ago in Africa and was larger than a polar bear, is seen in this artist's illustration released in Athens, Ohio, U.S., on April 18, 2019. (Photo/Agencies)
Simbakubwa kutokaafrika, a gigantic mammalian carnivore that lived 22 million years ago in Africa and was larger than a polar bear, is seen in this artist's illustration released in Athens, Ohio, U.S., on April 18, 2019. (Photo/Agencies)