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Spoiler alert! We're discussing plot points of 'Gladiator II' (in theaters now), so if you haven't seen it yet, retreat. Pack up your dusty sandals and brutal weapons, folks.
However, since the sharks’ presence in the fossil record has mostly consisted of isolated teeth, scientists have been left to speculate on what the rest of this ancient predator looked like ...
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.
“There were no sharks — ever — in the arena,” says Bartsch. “It would've been very hard to transport sharks for one thing, given that they'd have to be transported in water vessels.”
Given that all extant lamniform sharks give birth to live young, this is believed to have been true of megalodon also. [81] Infant megalodons were around 3.5 meters (11 ft) at their smallest, [ 35 ] : 61 and the pups were vulnerable to predation by other shark species, such as the great hammerhead shark ( Sphyrna mokarran ) and the snaggletooth ...
An analysis of a partially complete tail fin fossil shows that Cretoxyrhina had a lunate (crescent-shaped) tail most similar with modern lamnid sharks, whale sharks, and basking sharks. The transition to tail vertebrae is estimated to be between the 140th and 160th vertebrae out of the total 230, resulting in a total tail vertebral count of 70 ...
A team of scientists recently captured the elusive bluntnose sixgill shark, a deep-sea fish that has been on Earth before dinosaurs, on film.
During a four-year period from 1996 to 2000, an estimated 26 to 73 million sharks were killed and traded annually in commercial markets. [134] 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]