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2. Cretoxyrhina - Wikipedia

   en.wikipedia.org/wiki/Cretoxyrhina

   Cretoxyrhina (/ k r ɪ ˌ t ɒ k s i ˈ r h aɪ n ə /; meaning 'Cretaceous sharp-nose') is an extinct genus of large mackerel shark that lived about 107 to 73 million years ago during the late Albian to late Campanian of the Late Cretaceous.

3. Stethacanthidae - Wikipedia

   en.wikipedia.org/wiki/Stethacanthidae

   A shark with a structure on its back, such as a stethacanthid, could not have possibly been a fast swimmer. The first dorsal fin and spine could have produced a considerable amount of drag during fast locomotion. This suggests that Stethacanthids may have been rather sluggish bottom dwellers.

4. Extinct or Alive - Wikipedia

   en.wikipedia.org/wiki/Extinct_or_Alive

   Extinct or Alive is an American wildlife documentary television programme produced for Animal Planet by Hot Snakes Media of New York City, the United States.It is hosted by wildlife biologist and television personality Forrest Galante, who travels to different locations around the globe to learn about possibly extinct animals and whether or not there is a chance that they may still be extant. [1]

5. Otodus - Wikipedia

   en.wikipedia.org/wiki/Otodus

   The fossils of Otodus sharks indicate that they were very large macro-predatory sharks. [7] The largest known teeth of O. obliquus measure about 104 millimetres (4.1 in) in height. [8] The vertebral centrum of this species are over 12.7 cm (5 inch) wide. [7] Scientists suggest that O. obliquus would have measured about 8–9 metres (26–30 ft ...

6. Fossil of an ancient shark that swam in the age of ... - AOL

   www.aol.com/fossil-ancient-shark-swam-age...

   The outline of the body, which revealed the shark’s shape and fin location, also provides evidence that the prehistoric fish was not just a bottom-dweller as previously believed, but instead, a ...

7. Ptychodus - Wikipedia

   en.wikipedia.org/wiki/Ptychodus

   Ptychodus (from Greek: πτυχή ptyche 'fold' and Greek: ὀδούς odoús 'tooth') [1] is a genus of extinct large durophagous (shell-crushing) lamniform sharks from the Cretaceous period, spanning from the Albian to the Campanian. [2] Fossils of Ptychodus teeth are found in many Late Cretaceous marine sediments worldwide. [3]

8. Everything You Need to Know About the Real Megalodon, an ...

   www.aol.com/lifestyle/everything-know-real...

   Meg 2: The Trench hits theaters this week with a larger-than-life depiction of the megalodon. Here’s what we actually know about the beast, according to scientists.

9. ‘Once in a lifetime find,’ Boy finds massive, extinct shark ...

   www.aol.com/news/once-lifetime-boy-finds-massive...

   A Pennsylvania 8-year-old on vacation in SC found a huge fossilized tooth from a long-extinct shark species. ‘Once in a lifetime find,’ Boy finds massive, extinct shark tooth on SC vacation ...