Posts Tagged ‘isotopes’
Fossils link cooler ocean to extinction
CALTECH (US) — New evidence supports the idea that a mass extinction 450 million years ago was linked to a cooling climate. Continue…
Friday, January 28, 2011 11:35 - 0 Comments
Science & Technology - Aug 9, 2010 10:08 - 0 Comments
Why tin is ‘magic’ for physicists
RUTGERS (US)—In the journal Nature, physicists recently reported studies on tin that add knowledge to a concept known as magic numbers—while perhaps helping scientists to explain how heavy elements are made in exploding stars. (more…)
Society & Culture - Jun 8, 2010 16:12 - 0 Comments
Jamestown oysters record massive drought
UC DAVIS (US)—Oyster shells dumped in a well four centuries ago are shedding new light on the crippling drought that nearly wiped out the English settlement at Jamestown, Va., in its early years. (more…)
Science & Technology - May 25, 2010 10:31 - 0 Comments
Team takes temperature of extinct vertebrates
CALTECH (US)—Was Tyrannosaurus rex cold-blooded? Did birds regulate their body temperatures before or after they began to grow feathers? Through analysis of rare isotopes in the bones, teeth, and eggshells of large extinct vertebrates, a research team has taken a critical step toward answering such questions. (more…)
Science & Technology - Apr 29, 2010 0:49 - 0 Comments
Building a better cosmic ‘mousetrap’
MICHIGAN STATE (US)—Capturing fleeting bits of matter to reveal the nature of the universe is a little like trying to trap incredibly tiny, impossibly speedy mice. (more…)
Science & Technology - Mar 9, 2010 11:43 - 1 Comment
Tracking mercury’s ‘fingerprint’ in fish
U. MICHIGAN (US)—Scientists know that the primary way methylmercury affects people is through consumption of fish and shellfish. But how does the toxic substance get into species that live in the open ocean? (more…)
Earth & Environment - Feb 11, 2010 13:40 - 0 Comments
Arctic snow reveals mercury’s ‘fingerprint’
U. MICHIGAN (US)—Mercury deposited onto Arctic snow from the atmosphere takes on a life of its own as it is picked up by microorganisms that then build up in fish and animals that eat them. (more…)
Science & Technology - Jun 3, 2009 15:32 - 0 Comments
Dark, balmy Arctic home to ancient mammals
University of Colorado at Boulder researcher Jaelyn Eberle, left, searches for early mammal fossils in the high Arctic with Brendan Postnikoff of the University of Saskatchewan (blue parka) and Joe Kudlack, right, from Banks Island in the Northwest Territories. (Credit: University of Colorado)
