News tagged with extinction event

New Blow for Dinosaur-Killing Asteroid Theory

Space & Earth / Earth Sciences

Apr 27, 2009 | 4.4 / 5 (28) | 14

(PhysOrg.com) -- The enduringly popular theory that the Chicxulub crater holds the clue to the demise of the dinosaurs, along with some 65 percent of all species 65 million years ago, is challenged in a paper ...

Canada's shores saved animals from devastating climate change 252 million years ago

Space & Earth / Earth Sciences

Oct 01, 2008 | 4.5 / 5 (26) | 7

The shorelines of ancient Alberta, British Columbia and the Canadian Arctic were an important refuge for some of the world's earliest animals, most of which were wiped out by a mysterious global extinction event some 252 ...

Geologic Findings Undermine Theories of Permian Mass Extinction Timing

Space & Earth / Earth Sciences

Mar 02, 2009 | 4 / 5 (19) | 3

(PhysOrg.com) -- New scientific findings by geologist Robert Gastaldo of Colby College in Waterville, Maine, and colleagues call into question popular theories about the largest mass extinction in Earth's ...

Evidence of the 'Lost World' -- did dinosaurs survive the end Cretaceous extinctions?

Other Sciences / Archaeology & Fossils

Apr 28, 2009 | 4.5 / 5 (14) | 2

The Lost World, Sir Arthur Conan Doyle's account of an isolated community of dinosaurs that survived the catastrophic extinction event 65 million years ago, has no less appeal now than it did when it was written a century ...

Dinosaurs declined before mass extinction

Other Sciences / Archaeology & Fossils

Apr 30, 2009 | 4.1 / 5 (14) | 5

Dinosaurs were dying out much earlier than the mass extinction event 65 million years ago, Natural History Museum scientists report in the Proceedings of the Royal Society journal today.

Fossil magnetism helps prove mass extinction theory

Space & Earth / Earth Sciences

May 04, 2009 | 4.7 / 5 (12) | 0

(PhysOrg.com) -- Were major extinction events real biological catastrophes or were they merely the result of gaps in the fossil record? Research by a team of geologists from the Universities of Bristol, Plymouth, ...

Dino tooth sheds new light on ancient riddle

Other Sciences / Archaeology & Fossils

Jun 29, 2009 | 4.9 / 5 (8) | 0

Microscopic analysis of scratches on dinosaur teeth has helped scientists unravel an ancient riddle of what a major group of dinosaurs ate- and exactly how they did it!

Dinosaur-Killer was Soft on Algae

Space & Earth / Earth Sciences

Oct 02, 2009 | 4.3 / 5 (3) | 0

The asteroid impact that many researchers claim was the cause of the dinosaur die-off was bad news for marine life at the time as well. But new research shows that microalgae - one of the primary producers ...