News tagged with million years
Why is Greenland covered in ice?
Space & Earth / Earth Sciences
Aug 27, 2008 |
3.7 / 5 (63) |
14
There have been many reports in the media about the effects of global warming on the Greenland ice-sheet, but there is still great uncertainty as to why there is an ice-sheet there at all.
100 million years AD
Space & Earth / Earth Sciences
Sep 26, 2008 |
2.8 / 5 (62) |
58
(PhysOrg.com) -- Jan Zalasiewicz, a lecturer in geology at the University of Leicester, has published a new study looking at the lasting impression made by mankind -100 million years hence. He takes the perspective of alien ...
Volcanic eruptions wiped out ocean life 93 million years ago
Space & Earth / Earth Sciences
Jul 16, 2008 |
3.8 / 5 (38) |
8
University of Alberta scientists contend they have the answer to mass extinction of animals and plants 93 million years ago. The answer, research has uncovered, has been found at the bottom of the sea floor where lava fountains ...
Earliest Animal Footprints Ever Found -- Discovered in Nevada
Other Sciences / Archaeology & Fossils
Oct 05, 2008 |
4.6 / 5 (30) |
6
The fossilized trail of an aquatic creature suggests that animals walked using legs at least 30 million years earlier than had been thought. The tracks -- two parallel rows of small dots, each about 2 millimeters ...
Scientists uncover miscalculation in geological undersea record
Space & Earth / Earth Sciences
Sep 10, 2008 |
4.5 / 5 (28) |
3
The precise timing of the origin of life on Earth and the changes in life during the past 4.5 billion years has been a subject of great controversy for the past century. The principal indicator of the amount of organic carbon ...
Geologists push back date basins formed, supporting frozen Earth theory
Space & Earth / Earth Sciences
Jul 03, 2008 |
4.5 / 5 (25) |
1
Even in geology, it's not often a date gets revised by 500 million years. But University of Florida geologists say they have found strong evidence that a half-dozen major basins in India were formed a billion ...
Scientists say comet killed off mammoths, saber-toothed tigers
Space & Earth / Earth Sciences
Jan 02, 2009 |
4.5 / 5 (24) |
19
First an explosion as powerful as thousands of megatons of TNT rained meteorites down on North America. Then forest fires broke out across the continent, sending up a thick layer of soot and dust that blocked ...
Cold and ice, not heat, episodically gripped tropical regions 300 million years ago
Space & Earth / Earth Sciences
Jul 31, 2008 |
4.5 / 5 (22) |
3
Geoscientists have long presumed that, like today, the tropics remained warm throughout Earth's last major glaciation 300 million years ago.
Isthmus of Panama formed as result of plate tectonics
Space & Earth / Earth Sciences
Jul 30, 2008 |
4.5 / 5 (22) |
2
Contrary to previous evidence, a new University of Florida study shows the Isthmus of Panama was most likely formed by a Central American Peninsula colliding slowly with the South American continent through tectonic plate ...
Dinosaurs survived 2 mass extinctions and 50 million years before taking over the world and dominating ecosystems
Biology /
Sep 30, 2008 |
4.4 / 5 (22) |
1
Reporting in Biology Letters, Steve Brusatte, Professor Michael Benton, and colleagues at the University of Bristol show that dinosaurs did not proliferate immediately after they originated, but that their ...
Antarctic fossils paint a picture of a much warmer continent
Other Sciences / Archaeology & Fossils
Aug 04, 2008 |
4.6 / 5 (19) |
0
National Science Foundation-funded scientists working in an ice-free region of Antarctica have discovered the last traces of tundra--in the form of fossilized plants and insects--on the interior of the southernmost ...
Climate Change Alters Ocean Chemistry
Dec 11, 2008 |
3.2 / 5 (23) |
14
(PhysOrg.com) -- Researchers have discovered that the ocean's chemical makeup is less stable and more greatly affected by climate change than previously believed. The researchers report in the December 12, 2008 issue of Science that d ...
Extinction by asteroid a rarity: 'Sick Earth' extinctions more likely
Space & Earth / Earth Sciences
Oct 07, 2008 |
3.7 / 5 (18) |
7
In geology as in cancer research, the silver bullet theory always gets the headlines and nearly always turns out to be wrong.
Unique fossils capture 'Cambrian migration'
Other Sciences / Archaeology & Fossils
Oct 10, 2008 |
4.4 / 5 (15) |
0
(PhysOrg.com) -- A unique set of fossils indicates that 525 million years ago marine animals congregated in Earth’s ancient oceans, most likely for migration, according to an international team of scientists.
Decline of carbon-dioxide-gobbling plankton coincided with ancient global cooling
Biology /
Jan 08, 2009 |
4.6 / 5 (12) |
1
(PhysOrg.com) -- The evolutionary history of diatoms -- abundant oceanic plankton that remove billions of tons of carbon dioxide from the air each year -- needs to be rewritten, according to a new Cornell ...
