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Latest Extinction event Stories

2011-10-03 14:16:45

Harsh living conditions caused by major fluctuations in the carbon content and sea levels, overacidification and oxygen deficiency in the seas triggered the largest mass extinction of all time at the end of the Permian era 252 million years ago. Life on Earth was also anything but easy after the obliteration of over 90 percent of all species: Throughout the entire Early Triassic era, metazoan-dominated reefs were replaced by microbial deposits. Researchers had always assumed it took the Earth...

NASA Says Dinosaur Killer Still Remains At Large
2011-09-19 13:40:36

  NASA said on Monday that the family of asteroids believed to be responsible for the destruction of dinosaurs is innocent. Observations made by NASA's Wide-field Infrared Survey Explorer (WISE) confirmed that a 2007 study's claims that a huge asteroid known as Baptistina destroyed the dinosaurs was false. Although the new discovery has abolished one theory of how the dinosaurs ceased to exist, it did not bring about any new theories on the topic. The original theory used...

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2011-07-22 06:20:00

The release of a huge amount of methane gas may have caused a massive, prehistoric extinction that gave way to the arrival of dinosaurs as the dominant life form on earth, according to a new study. Micha Ruhl and his team of researchers from the Nordic Center for Earth Evolution at the University of Copenhagen in Denmark suggest that the mass extinction of half of Earth's marine life over 200 million years ago was a result of a huge release of carbon methane into the atmosphere, which led to...

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2011-06-15 13:25:00

Researchers have pinpointed the timing of the start of an ancient global warming episode known as the Paleocene-Eocene thermal maximum (PETM). The early part of the Cenozoic era witnessed a series of transit global warming events called hyperthermals.  The most severe of these was the PETM at the Paleocene-Eocene boundary, which took place around 56 million years ago. Over a 20,000-year period, ocean temperatures rose globally by about 41 degrees Fahrenheit.  The team said one...

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2011-03-27 11:22:15

After the biggest mass extinction in Earth's history "“ 250 million years ago "“ algae and bacteria in the ocean rebounded so fast that they consumed virtually all the oxygen in the sea, slowing the recovery of the rest of marine animals for several million years.A mass extinction is hard enough for Earth's biosphere to handle, but when you chase it with prolonged oxygen deprivation, the biota ends up with a hangover that can last millions of years.Such was the situation with the...

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2011-02-18 10:45:00

Researchers use a ground-breaking technique that reveals a relationship between cooler temperatures and Earth's second largest mass extinction, which occurred about 450 million years ago In the Late Ordovician Period of Earth's geologic history, about 450 million years ago, more than 75 percent of marine species perished and Earth scientists have been seeking to discover what caused the extinction. It was the second largest in Earth's history. Now, using a new research method, investigators...

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2011-01-29 11:42:34

About 450 million years ago, Earth suffered the second-largest mass extinction in its history"”the Late Ordovician mass extinction, during which more than 75 percent of marine species died. Exactly what caused this tremendous loss in biodiversity remains a mystery, but now a team led by researchers at the California Institute of Technology (Caltech) has discovered new details supporting the idea that the mass extinction was linked to a cooling climate."While it's been known for a long...

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2010-12-22 09:25:00

A massive new fossil site discovered in southwestern China marks the first discovery of a complete ecosystem which recovered following a mass extinction. According to Guardian Science Correspondent Ian Sample, "the spectacular haul of 20,000 fossils," which was discovered at a hillside in what it now Luoping county in the Yunnan Province of China, were "beautifully preserved" and included "mollusks, sea urchins and arthropods, alongside much larger animals that occupied the top of the food...

2010-11-30 14:05:58

Australian marine scientists have expressed disquiet over the continued worldwide spread of large, dead zones in the ocean. Professor Ove Hoegh-Guldberg and Professor Mark McCormick of the ARC Centre of Excellence for Coral Reef Studies have recently published scientific articles which raise concern about the impact of large areas of ocean emerging which are so low in oxygen that fish and other sea life cannot survive. Hundreds of dead zones are being reported around the world in areas that...


Word of the Day
sough
  • A murmuring sound; a rushing or whistling sound, like that of the wind; a deep sigh.
  • A gentle breeze; a waft; a breath.
  • Any rumor that engages general attention.
  • A cant or whining mode of speaking, especially in preaching or praying; the chant or recitative characteristic of the old Presbyterians in Scotland.
  • To make a rushing, whistling, or sighing sound; emit a hollow murmur; murmur or sigh like the wind.
  • To breathe in or as in sleep.
  • To utter in a whining or monotonous tone.
According to the OED, from the 16th century, this word is 'almost exclusively Scots and northern dialect until adopted in general literary use in the 19th.'
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