It was the size of a car and its teeth were the size of bananas.

Mauricio Anton / National GeographicSimbakubwa kutokaafrika

Modern discoveries are sometimes but a matter of fate . That ’s what happened when paleontologist Matt Borths serendipitously came across the fossils of Africa ’s largest carnivorous mammalian , one that walked the Earth some 23 million years ago .

accord toNational Geographic , Borths found the beast keepsake in the drawers of the dodo collection at the Nairobi National Museum in Kenya . He was work on his dissertation on hyaenodonts , a group of extinct mammal named for their resemblance to New - day hyenas ( though they are not actually concern to hyenas ) .

Simbakubwa Kutokaafrika Drawing

Mauricio Anton/National GeographicSimbakubwa kutokaafrika

The bones he encountered belonged to a newly named species , Simbakubwa kutokaafrika , which is part of the hyaenodonts ’ family tree and is believe to have been an apex predator of prehistorical sub - Saharan Africa .

“ Opening a museum drawer , we see a course of gigantic center - eating tooth , clearly belonging to a species new to science , ” Borth , who is the curator of the Division of Fossil Primates at Duke University , said in a statement .

The fossils had originally been stab up between 1978 and 1980 in Meswa Bridge , western Kenya . The original team was focalise on looking for ancient ape , so the bones ended up uninfluenced among the Nairobi museum ’s assembling for decade .

Simbakubwa Fossils

Matthew Borths/National GeographicFossils of theSimbakubwa kutokaafrika.

Borths team up up with fellow paleontologist Nancy Stevens , who had notice a freestanding batch of fossils in Tanzania that were estimated to be a couple million twelvemonth one-time . The two began break down the neglect fossils and describing the specimen . The collection of unknown remains included parts of the animal ’s jaw , skeleton , skull , and teeth .

Now , their discipline of the fogy has been published in theJournal of Vertebrate Paleontologyand it ’s clear that they ’ve separate a new — and terrifying — prehistorical beast .

Matthew Borths / National GeographicFossils of theSimbakubwa kutokaafrika .

Simbakubwa Kutokaafrika Human Size Comparison

Mauricio Anton/National GeographicA size comparison between aSimbakubwa kutokaafrikaand a human.

Still , not much is know about ancient predators like theSimbakubwa . We do get laid that , though its name was derive from the Swahili watchword for “ braggy lion , ” this mega predator was in reality not a big cat . In fact , the investigator find that it was the oldest known member of the hyaenodonts family , which is not a Arabian tea family .

But though it was n’t a cat , it was indeed big . Scientists said that it was likely larger than a polar bear , which holds the title for biggest sublunar carnivorous animal alive today .

Even the teeth of theSimbakubwaalone were startling . Their molars were more than two in long , while its canine front dentition measure eight in each , rough the size of it of a banana tree . What ’s even more startling , modern - day predator like wolves and bear only have one duad of canine tooth teeth , but theSimbakubwahad three .

“ This fauna had tidy sum of blades , ” Borth said .

As for the sizing of the rest of the animal , researchers say it was about four base magniloquent , eight understructure retentive , and weighed in at more than 1.5 tonnes ( about the size of a car ) — making it grownup than any mammalian carnivore on disc today .

“ The skill is definitely very impressive , ” Jack Tseng , an evolutionary life scientist who was not ask in the study , said in an interview about the find . “ Any time you have a new record of something this large in the creature and ecologic food World Wide Web , it make you reconsider exactly what the interactions were like between vulture and prey . ”

Mauricio Anton / National GeographicA size of it comparison between aSimbakubwa kutokaafrikaand a man .

what is more , theSimbakubwahelps researchers understand the changing ecosystem that was in stead some 20 million years ago , when the landmass of Africa began shifting nigher toward Eurasia . The elephantine geographical shimmy created a change in environments and animals between the two landmass began to mix across continents . That kind of ecological exchange “ raises all kind of hell , ” Borths said .

The young species also helps scientist bring out more details about the human relationship that exist in the intellectual nourishment chain at the time .

“ Once you calculate out the relationships between these beast , you may start to do things like gauge how big do you recollect the vernacular ascendent of these creatures was , what was the creation like when that theoretical vulgar antecedent might have been active ? ” he tell . “ you may experiment with the data a little routine to figure out how these big evolutionary changes map out onto other change , like climate change and continental purport . ”

While discoveries like this one could provide new penetration into the prominent - scale story of life on planet Earth , they also just remind us how favorable we are to not exist side - by - side with awful tool like these .

After take about the heavy carnivorous mammal of ancient times , say aboutthe grounds of the legendary “ King Polar Bear ” that was discovered in Alaska . Then , learn about the mostterrifying prehistoric creaturesthat were n’t dinosaurs .