Quantcast

Latest Younger Dryas Stories

2010-04-12 11:25:00

Study suggests that Ice Age climate change did not pose significant challenges to first Americans Paleoindian groups* occupied North America throughout the Younger Dryas interval, which saw a rapid return to glacial conditions approximately 11,000 years ago. Until now, it has been assumed that cooling temperatures and their impact on communities posed significant adaptive challenges to those groups. David Meltzer from the Southern Methodist University in Dallas, USA, and Vance Holliday from...

ce63c08b45e0a4a7770bc7c2b6131b551
2010-04-12 09:13:23

Did a change in climate or an extraterrestrial impact bring an end to the beasts and people that roamed the Southwest shortly after the last ice age? A team of researchers from the University of Arizona has revisited evidence pointing to a cataclysmic event thought by many scientists to have wiped out the North American megafauna "“ such as mammoths, saber tooth cats, giant ground sloths and Dire wolves "“ along with the Clovis hunter-gatherer culture some 13,000 years ago. The...

240e04d6cc75f59b05f2facfa793ad491
2010-03-31 15:00:14

The main cause of a rapid global cooling period, known as the Big Freeze or Younger Dryas - which occurred nearly 13,000 years ago - has been identified thanks to the help of an academic at the University of Sheffield. A new paper, to be published in Nature on April 1, 2010, has identified a mega-flood path across North America which channeled melt-water from a giant ice sheet into the oceans and triggering the Younger Dryas cold snap. The research team, which included Dr Mark Bateman from...

c0f5e99d1d8b9b022f4fb2c4e93177af
2009-12-08 11:25:00

An international team of scientists led by researchers at the University of Hawaii at Manoa have found no evidence supporting an extraterrestrial impact event at the onset of the Younger Dryas ~13000 years ago. The Younger Dryas is an abrupt cooling event in Earth's history. It coincided with the extinction of many large mammals including the woolly mammoth, the saber toothed jaguar and many sloths. This cooling period is generally considered to be the result of the complex global climate...

561272a6b188a645d5d63a51582dca671
2009-11-30 10:42:06

In the film, "ËœThe Day After Tomorrow' the world enters the icy grip of a new glacial period within the space of just a few weeks. Now new research shows that this scenario may not be so far from the truth after all. William Patterson, from the University of Saskatchewan in Canada, and his colleagues have shown that switching off the North Atlantic circulation can force the Northern hemisphere into a mini "Ëœice age' in a matter of months. Previous work has indicated that...

a381267bc8f93462edb9163ab5e3090a
2009-09-02 14:53:50

Scientists identify 'tipping points' at which sudden shifts to new conditions occur What do abrupt changes in ocean circulation and Earth's climate, shifts in wildlife populations and ecosystems, the global finance market and its system-wide crashes, and asthma attacks and epileptic seizures have in common? According to a paper published this week in the journal Nature, all share generic early-warning signals that indicate a critical threshold of change dead ahead. In the paper, Martin...

cbe67dbaeb21508ef49c844af53d2de71
2009-02-17 08:34:57

An article published in the prestigious science magazine Nature Geoscience yesterday shows that the period towards the end of the ice age was engraved by extreme and short-lived variations, which finally terminated the ice age. A group of scientists at the Bjerknes Centre for Climate Research and the University of Bergen in Norway, together with colleagues at ETH, Zrich, combined terrestrial and marine proxy palaeo-data covering the latest part of the ice age to improve our understanding of...

ca0f3deb5d4d586061d7a3df3f6fc2a11
2009-01-27 08:15:00

New data, published yesterday, disproves the recent theory that a large comet exploded over North America 12,900 years ago, causing a shock wave that traveled across North America at hundreds of kilometers per hour and triggering continent-wide wildfires. Dr Sandy Harrison from the University of Bristol and colleagues tested the theory by examining charcoal and pollen records to assess how fire regimes in North America changed between 15 and 10,000 years ago, a time of large and rapid climate...

4ccb11850a85d60e6b91867c036e05ec
2009-01-02 08:30:00

Abundant tiny particles of diamond dust exist in sediments dating to 12,900 years ago at six North American sites, adding strong evidence for Earth's impact with a rare swarm of carbon-and-water-rich comets or carbonaceous chondrites, reports a nine-member scientific team. These nanodiamonds, which are produced under high-temperature, high-pressure conditions created by cosmic impacts and have been found in meteorites, are concentrated in similarly aged sediments at Murray Springs, Ariz.,...

9ff1d18d40ce6db7c970b29234905b0b1
2008-08-02 13:40:00

Scientists warn the climate can abruptly change, based on data that shows 12,679 years ago a dramatic cooling of the climate happened in Western Europe due to a shift of icy winds over the Atlantic. Researchers looked at annual layers at the bottom of Lake Meerfelder Maar in Germany that showed an abrupt change in sediments consistent with a sudden chill over just one year. They studied pollens, minerals and other matter. "Our data indicate an abrupt increase in storminess during the autumn...


Word of the Day
lunula
  • A small crescent-shaped structure or marking, especially the white area at the base of a fingernail that resembles a half-moon.
This word is a diminutive of the Latin 'luna,' moon.
Related