http://www.physorg.com/ en-us Physorg.com internet news portal provides the latest news on science including: Physics, Nanotechnology, Life Sciences, Space Science, Earth Science, Environment, Health and Medicine. The analysis of carbon and oxygen isotopes embedded in tree rings may shed new light on past climate events in the Mackenzie Delta region of northern Canada. http://www.physorg.com/news179073024.html Space & Earth Thu, 03 Dec 2009 14:40:02 EST news179073024 (PhysOrg.com) -- The scalding-hot sea that supposedly covered the early Earth may in fact never have existed, according to a new study by Stanford University researchers who analyzed isotope ratios in 3.4 billion-year-old ocean floor rocks. Their findings suggest that the early ocean was much more temperate and that, as a result, life likely diversified and spread across the globe much sooner in Earth's history than has been generally theorized. http://www.physorg.com/news177168552.html Space & Earth Wed, 11 Nov 2009 14:00:01 EST news177168552 Fossil land snail shells found in ancient soils on the subtropical eastern Canary Islands show that the Spanish archipelago off the northwest coast of Africa has become progressively drier over the past 50,000 years. http://www.physorg.com/news175884639.html Space & Earth Tue, 27 Oct 2009 17:51:31 EST news175884639 At times in the distant past, an abrupt change in climate has been associated with a shift of seasonal monsoons to the south, a new study concludes, causing more rain to fall over the oceans than in the Earth's tropical regions, and leading to a dramatic drop in global vegetation growth. http://www.physorg.com/news163949839.html Space & Earth Thu, 11 Jun 2009 15:00:01 EST news163949839 A new University of Florida study shows mammals change their dietary niches based on climate-driven environmental changes, contradicting a common assumption that species maintain their niches despite global warming. http://www.physorg.com/news163226727.html Other Sciences Wed, 03 Jun 2009 05:47:45 EST news163226727 (PhysOrg.com) -- Ancestors of tapirs and ancient cousins of rhinos living above the Arctic Circle 53 million years ago endured six months of darkness each year in a far milder climate than today that featured lush, swampy forests, according to a new study led by the University of Colorado at Boulder. http://www.physorg.com/news163081573.html Space & Earth Mon, 01 Jun 2009 13:26:49 EST news163081573 Will the Netherlands that is dominated by water succumb to the 'Inconvenient Truth' predicted by Al Gore? Dutch researcher Martin van Breukelen analysed stalagmites from the South American Amazon tributaries in Peru. He used stalagmites to reconstruct climate changes in the past. http://www.physorg.com/news160223787.html Space & Earth Wed, 29 Apr 2009 11:37:01 EST news160223787 (PhysOrg.com) -- A University of Arkansas researcher studying the way caves "breathe" is providing new insights into the process by which scientists study paleoclimates. http://www.physorg.com/news155836786.html Space & Earth Mon, 09 Mar 2009 17:01:02 EST news155836786 Asteroids are hunks of rock that orbit in the outer reaches of space, and scientists have generally assumed that their small size limited the types of rock that could form in their crusts. But two newly discovered meteorites may rewrite the book on how some asteroids form and evolve. Researchers from the Carnegie Institution, the University of Maryland, and the University of Tennessee report in the January 8th edition of Nature that these meteorites are ancient asteroid fragments consisting of feldspar-rich rock called andesite. Similar rocks were previously known only from Earth, making these samples the first of their kind from elsewhere in the Solar System. http://www.physorg.com/news150557683.html Space & Earth Wed, 07 Jan 2009 13:34:43 EST news150557683 A strange mix of oxygen found in a stony meteorite that exploded over Pueblito de Allende, Mexico nearly 40 years ago has puzzled scientists ever since. Small flecks of minerals lodged in the stone and thought to date from the beginning of the solar system have a pattern of oxygen types, or isotopes, that differs from those found in all known planetary rocks, including those from Earth, its Moon and meteorites from Mars. http://www.physorg.com/news139757643.html Space & Earth Thu, 04 Sep 2008 14:34:03 EST news139757643