Quantcast
Last updated on April 18, 2014 at 7:29 EDT

Latest Extinction event Stories

ef86477e3a13a0a0525e63e46b400dbc1
2007-10-24 13:30:00

WASHINGTON -- Whenever the world's tropical seas warm several degrees, Earth has experienced mass extinctions over millions of years, according to a first-of-its-kind statistical study of fossil records. And scientists fear it may be about to happen again - but in a matter of several decades, not tens of millions of years. Four of the five major extinctions over 520 million years of Earth history have been linked to warmer tropical seas, something that indicates a warmer world overall,...

38a0aa0b0248e8dcad7237fac0a20aa61
2007-08-23 11:27:59

Caused wooly mammoth extinction, global cooling and end of early human Clovis culture NSF - New scientific findings suggest that a large comet may have exploded over North America 12,900 years ago, explaining riddles that scientists have wrestled with for decades, including an abrupt cooling of much of the planet and the extinction of large mammals. The discovery was made by scientists from the University of California at Santa Barbara and their colleagues. James Kennett, a paleoceanographer...

58c0db02ce27a4bec66beb3442feaa61
2006-12-08 13:00:00

The sudden appearance of large animal fossils more than 500 million years ago "“ a problem that perplexed even Charles Darwin and is commonly known as "Darwin's Dilemma" "“ may be due to a huge increase of oxygen in the world's oceans, says Queen's paleontologist Guy Narbonne, an expert in the early evolution of animals and their ecosystems. In 2002, Dr. Narbonne and his research team found the world's oldest complex life forms between layers of sandstone on the southeastern...

c1d23a60b62ce3dcfd79ac5e20e83a3d1
2005-09-27 16:30:00

BERKELEY, CA -- A distant supernova that exploded 41,000 years ago may have led to the extinction of the mammoth, according to research that was presented by nuclear scientist Richard Firestone of the U.S. Department of Energy's Lawrence Berkeley National Laboratory (Berkeley Lab). Firestone, who conducted this research with Arizona geologist Allen West, will unveil this theory at the 2nd International Conference "The World of Elephants" in Hot Springs, SD. Their theory joins the list...

2005-09-07 16:00:00

An oxygen-free ocean from bottom to surface is probably the worst scenario that marine higher life can experience. Are processes and feedbacks linking the atmosphere to the deep ocean capable to cause a rapid change from an oxygen-rich to an oxygen-free deep ocean? And what are the consequences for the global carbon cycle that ultimately drive marine and terrestrial ecosystems and climate variation? These are fundamental and burning questions on the society's agenda. Hurricane Katrina and...

2005-08-08 17:29:15

VANCOUVER, British Columbia (Reuters) - Meteor strikes may have led to the extinction of some life on Earth, but they may have also contributed to the creation of life, according to a study released on Monday. Geologists researching the crater left when the Haughton meteor slammed into what is now Canada's Arctic 23 million years ago found the impact created hydrothermal springs in the cracked rock and other conditions that would have made it easier for microbes to survive and evolve. The...

a47c00aee99abf51091f3e170d06f4331
2005-04-07 07:05:00

NASA -- Scientists at NASA and the University of Kansas say that a mass extinction on Earth hundreds of millions of years ago could have been triggered by a star explosion called a gamma-ray burst. The scientists do not have direct evidence that such a burst activated the ancient extinction. The strength of their work is their atmospheric modeling -- essentially a "what if" scenario. The scientists calculated that gamma-ray radiation from a relatively nearby star explosion, hitting the Earth...

c8b4569f9e55720a8c4009e69a0e814b1
2005-03-15 07:43:03

BERKELEY, CA -- A detailed and extensive new analysis of the fossil records of marine animals over the past 542 million years has yielded a stunning surprise. Biodiversity appears to rise and fall in mysterious cycles of 62 million years for which science has no satisfactory explanation. The analysis, performed by researchers with the U.S. Department of Energy's Lawrence Berkeley National Laboratory (Berkeley Lab) and the University of California at Berkeley, has withstood thorough...

5316ebe8aa6ba5e033c92a0527ab14811
2005-02-22 00:00:00

Penn -- Volcanic eruptions in Siberia 251 million years ago may have started a cascade of events leading to high hydrogen sulfide levels in the oceans and atmosphere and precipitating the largest mass extinction in Earth's history, according to a Penn State geoscientist. "The recent dating of the Siberian trap volcanoes to be contemporaneous with the end-Permian extinction suggests that they were the trigger for the environmental events that caused the extinctions," says Dr. Lee R. Kump,...