What makes a mammal a mammal? Our spine, say scientists
Mammals are unique in many ways. We're warm-blooded and agile in comparison with our reptilian relatives.
Archaeology
Sep 20, 2018
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Page 2 - News tagged with extinct animal
Tasmanian tiger doomed long before humans came along
The Tasmanian tiger was doomed long before humans began hunting the enigmatic marsupial, scientists said Tuesday, with DNA sequencing showing it was in poor genetic health for thousands of years before its extinction.
Plants & Animals
Dec 12, 2017
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Evidence that Earth's first mass extinction was caused by critters not catastrophe
In the popular mind, mass extinctions are associated with catastrophic events, like giant meteorite impacts and volcanic super-eruptions.
Earth Sciences
Sep 2, 2015
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Not too fast, not too slow: Researchers untangle energetics of extinct dinosaurs
(Phys.org) —Dinosaurs dominated the landscape for more than 100 million years, but all that remains today are bones. This has made it difficult to solve a long-standing and contentious puzzle: were dinosaurs cold-blooded ...
Archaeology
Jun 12, 2014
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Pigments reveal extinct reptiles' dark side
What did Tyrannosaurus rex really look like? Depending on which artist's impression you look at, the carnivorous king of the Cretaceous was a dull grey, an earthy brown, maybe a dark green... perhaps it was ochre, or even ...
Archaeology
Jan 8, 2014
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Dinosaur predecessors gain ground in wake of world's biggest biodiversity crisis
Many scientists have thought that dinosaur predecessors missed the race to fill habitats emptied when nine out of 10 species disappeared during the Earth's largest mass extinction, approximately 252 million years ago. The ...
Archaeology
Apr 29, 2013
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The ethics of resurrecting extinct species
(Phys.org) —At some point, scientists may be able to bring back extinct animals, and perhaps early humans, raising questions of ethics and environmental disruption.
Other
Apr 8, 2013
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Tropical collapse caused by lethal heat: Extreme temperatures blamed for 'dead zone'
Scientists have discovered why the 'broken world' following the worst extinction of all time lasted so long – it was simply too hot to survive.
Earth Sciences
Oct 18, 2012
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Algae and bacteria hogged oxygen after ancient mass extinction, researchers say
(PhysOrg.com) -- After the biggest mass extinction in Earth's history -- 250 million years ago -- ocean algae and bacteria rebounded so fast that they consumed virtually all the oxygen in the sea, slowing the recovery of ...
Earth Sciences
Mar 25, 2011
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Oxygen's challenge to early life
The conventional view of the history of the Earth is that the oceans became oxygen-rich to approximately the degree they are today in the Late Ediacaran Period (about 600 million years ago) after staying relatively oxygen-poor ...
Earth Sciences
Jan 5, 2011
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