![Mysterious fossil of a giant prehistoric fish with circular saw-shaped teeth found in Russia | Daily Mail Online Mysterious fossil of a giant prehistoric fish with circular saw-shaped teeth found in Russia | Daily Mail Online](https://i.dailymail.co.uk/1s/2019/11/29/13/21618362-0-image-a-14_1575034019343.jpg)
Mysterious fossil of a giant prehistoric fish with circular saw-shaped teeth found in Russia | Daily Mail Online
![Paleontologist announces discovery of second saber-tooth catlike species that once roamed San Diego area - The San Diego Union-Tribune Paleontologist announces discovery of second saber-tooth catlike species that once roamed San Diego area - The San Diego Union-Tribune](https://ca-times.brightspotcdn.com/dims4/default/49892ae/2147483647/strip/true/crop/3960x2594+0+0/resize/1200x786!/quality/80/?url=https%3A%2F%2Fcalifornia-times-brightspot.s3.amazonaws.com%2F90%2F08%2Fc298f7d5446ba0863f85fae85577%2Fpangurban-egiae-4.jpg)
Paleontologist announces discovery of second saber-tooth catlike species that once roamed San Diego area - The San Diego Union-Tribune
![Prehistoric Predators With Supersized Teeth Had Beefier Arm Bones | NSF - National Science Foundation Prehistoric Predators With Supersized Teeth Had Beefier Arm Bones | NSF - National Science Foundation](https://www.nsf.gov/news/mmg/media/images/sabertoothed1_f.jpg)
Prehistoric Predators With Supersized Teeth Had Beefier Arm Bones | NSF - National Science Foundation
![Of the big cats that once roamed America only the mountain lion remains. Jaguars were reported by Thomas Jefferson as an American species and there have been few recent sightings in states Of the big cats that once roamed America only the mountain lion remains. Jaguars were reported by Thomas Jefferson as an American species and there have been few recent sightings in states](https://i.redd.it/vzdtzsaqnx151.jpg)