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However, viruses are still poorly understood and may have arisen before "life" itself, or may be a more recent phenomenon. Major extinctions in terrestrial vertebrates and large amphibians. Earliest examples of armoured dinosaurs. 195 Ma First pterosaurs with specialized feeding (Dorygnathus). First sauropod dinosaurs.
Previous estimates of a species known as Ptychodus mortoni put it at 11.2 meters (nearly 37 feet), but the revised size is still larger than modern apex shark predators, the authors note in the study.
Sharks are often killed for shark fin soup. Fishermen capture live sharks, fin them, and dump the finless animal back into the water. Shark finning involves removing the fin with a hot metal blade. [129] The resulting immobile shark soon dies from suffocation or predators. [135] Shark fin has become a major trade within black markets all over ...
Sharks often employ complex hunting strategies to engage large prey animals. Great white shark hunting strategies may be similar to how megalodon hunted its large prey. [75] Megalodon bite marks on whale fossils suggest that it employed different hunting strategies against large prey than the great white shark. [52]
Get excited for the 35th official Shark Week, from July 23 to July 29, with these shark facts. Sharks are millions of years older than dinosaurs and 5 other facts that may surprise you Skip to ...
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.
For generations raised on dinosaur toys, “Jurassic Park” films and characters like Barney, it's hard to imagine a world where dinos and their fossils didn't exist — or, more accurately ...
Liggett and others reported the discovery of a giant plesiosaur flipper from the Greenhorn Limestone of Kansas. Although a significant portion of the specimen was missing, it implied a life length of more than 2 m. The researchers tentatively attributed the flipper to Brachauchenius lucasi. The specimen is now catalogued as FHSM VP-13997. [78]