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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.
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]
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Carcharomodus is an extinct genus of lamnid shark.Its only species is Carcharomodus escheri, [1] commonly nicknamed the serrated mako shark or Escher's mako shark.It is an extinct lamnid that lived during the Miocene and that was formerly thought to have been transitional between the broad-toothed "mako" Cosmopolitodus hastalis and the modern great white, but is now considered to be an ...
In 2008, a team of scientists led by S. Wroe conducted an experiment to determine the bite force of the great white shark, using a 2.5-meter (8.2 ft) long specimen, and then isometrically scaled the results for its maximum size and the conservative minimum and maximum body mass of megalodon.
In the continental U.S., the most recent cataclysmic eruption of a volcano was Mount St. Helens on May 18, 1980. “Vancouver, Vancouver, this is it!” radioed U.S. Geological Survey scientist ...
Stethacanthidae is an extinct family of prehistoric sharks. [1] It is estimated to have existed approximately between 380 and 300 million years ago. Members of this family are noted for their peculiar dorsal fin.
The Kavachi volcano in the Solomon Islands is an underwater volcano that was dubbed a sharkcano after a 2015 expedition discovered sharks living within it. ... The post NASA captures ‘Sharkcano ...