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Giant insects ruled the prehistoric skies during periods when Earth's atmosphere was rich in oxygen. Then came the birds. After the evolution of birds about 150 million years ago, insects got smaller despite rising oxygen levels, according to a new study by scientists at the University of California, Santa Cruz.
Prehistoric Hyper-carnivorous Whale?! by Sid Perkins, Science News What would you get if you crossed a whale with a shark? Maybe something like Leviathan melvillei, a long-extinct, hypercarnivorous whale with teeth longer than any T. rex ever had. L. melvillei — a newly described sperm whale named to honor Herman Melville, author of the whaling novel Moby-Dick — lived between 12 million and 13 million years ago, says Olivier Lambert, a vertebrate paleontologist at the National Museum of N...
Ammonite fossil: These creatures lived between 240 - 65 million years ago, when they became extinct along with the dinosaurs. 'ammonite' (usually lower-case) originates from the Greek Ram-horned god called Ammon. Ammonites belong to a group of predators known as cephalopods, which includes their living relatives the octopus, squid, cuttlefish and nautilus. Ammonites moved by jet propulsion, expelling water through a funnel-like opening to propel themselves in the opposite direction.