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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.
Although the shark’s exact diet is still unknown, the researchers suggest that this revised hypothesis about what it ate could be a hint at the cause of Ptychodus’ extinction, since it puts ...
In the 1994 book Planet Ocean: A Story of Life, the Sea, and Dancing to the Fossil Record, author Brad Matsen and artist Ray Troll describe and depict a reconstruction based on the information gleaned by Bendix-Almgreen (1966). They proposed that no teeth were present in the animal's upper jaw, besides crushing teeth for the whorl to cut against.
Letter concerning the discovery of the 1823 Plesiosaurus, from Mary Anning.. This timeline of plesiosaur research is a chronologically ordered list of important fossil discoveries, controversies of interpretation, taxonomic revisions, and cultural portrayals of plesiosaurs, an order of marine reptiles that flourished during the Mesozoic Era.
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 ...
A team of scientists recently captured the elusive bluntnose sixgill shark, a deep-sea fish that has been on Earth before dinosaurs, on film.
The book's title is similar to a 1995 book title, The Sixth Extinction by Richard Leakey and Roger Lewin. Also included are excerpts from interviews with a forest ecologist , atmospheric scientist Ken Caldeira , wildlife and conservation experts, a modern-day geologist, and fungus researchers in New England and New York State .
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 ...