(PhysOrg.com) -- At the end of the Cretaceous period some 65 million years ago, an asteroid slammed into Mexico’s Yucatan Peninsula, causing severe but selective extinction. While that is widely accepted, it has remained ...
If you look at enough dinosaur fossils, you'll see that their skulls sport an amazing variety of bony ornaments, ranging from the horns of Triceratops and the mohawk-like crests of hadrosaurs to the bumps and knobs covering ...
Plants & Animals
May 23, 2023
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211
An Egyptian-American team of researchers has announced the discovery of a new kind of large-bodied meat-eating dinosaur, or theropod, from a celebrated fossil site in Egypt's Sahara Desert. The fossil of a still-unnamed species ...
Paleontology & Fossils
Jun 9, 2022
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319
Around 120 million years ago, the earth experienced an extreme environmental disruption that choked oxygen from its oceans.
Earth Sciences
Dec 21, 2020
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64
In findings published Aug. 6 in the journal Current Biology, researchers from New Jersey Institute of Technology (NJIT), Chinese Academy of Sciences and University of Rennes in France have unveiled a stunning 99-million-year-old ...
Archaeology
Aug 6, 2020
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756
Researchers have found evidence of rainforests near the South Pole 90 million years ago, suggesting the climate was exceptionally warm at the time.
Earth Sciences
Apr 1, 2020
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A new relative of the Tyrannosaurus rex—much smaller than the huge, ferocious dinonsaur made famous in countless books and films, including, yes, "Jurassic Park—has been discovered and named by a Virginia Tech paleontologist ...
Archaeology
May 6, 2019
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1080
A newly discovered, diminutive—by T. rex standards—relative of the tyrant king of dinosaurs reveals crucial new information about when and how T. rex came to rule the North American roost.
Archaeology
Feb 21, 2019
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442
A new dinosaur that wears its "heart" on its tail provides new clues to how ecosystems evolved on the African continent during the Cretaceous period according to researchers at Ohio University.
Archaeology
Feb 13, 2019
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684
During the late Cretaceous period, more than 65 million years ago, birds belonging to hundreds of different species flitted around the dinosaurs and through the forests as abundantly as they flit about our woods and fields ...
Archaeology
Nov 13, 2018
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The Cretaceous (pronounced /kriːˈteɪʃəs/), Latin language for "chalky", usually abbreviated K for its German translation Kreide (chalk), is a geologic period and system from circa 145.5 ± 4 to 65.5 ± 0.3 million years ago (Ma). In the geologic timescale, the Cretaceous follows on the Jurassic period and is followed by the Paleogene period. It is the youngest period of the Mesozoic era, and at 80 million years long, the longest period of the Phanerozoic eon. The end of the Cretaceous defines the boundary between the Mesozoic and Cenozoic eras. In many foreign languages this period is known as "chalk period".
The Cretaceous was a period with a relatively warm climate and high eustatic sea level. The oceans and seas were populated with now extinct marine reptiles, ammonites and rudists; and the land by dinosaurs. At the same time, new groups of mammals and birds as well as flowering plants appeared. The Cretaceous ended with one of the largest mass extinctions in Earth history, the K-T extinction, when many species, including the dinosaurs, pterosaurs, and large marine reptiles, disappeared.
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