[Geology2] New fossils of oldest American primate

New fossils of oldest American primate
PhysOrg.com [USA], November 16, 2011

Johns Hopkins researchers have identified the first ankle and toe bone
fossils from the earliest North American true primate, which they say
suggests that our earliest forerunners may have dwelled or moved
primarily in trees, like modern day lemurs and similar mammals.

http://www.physorg.com/news/2011-11-fossils-oldest-american-primate.html

Also:

Researchers pinpoint date and rate of Earth's most extreme extinction
EurekAlert [USA], 17-Nov-2011

It's well known that Earth's most severe mass extinction occurred about
250 million years ago. What's not well known is the specific time when
the extinctions occurred. A team of researchers from North America and
China have published a paper in Science this week which explicitly
provides the date and rate of extinction. "This is the first paper to
provide rates of such massive extinction," says Dr. Charles Henderson,
professor in the Department of Geoscience at the University of Calgary
and co-author of the paper: Calibrating the end-Permian mass extinction.
"Our information narrows down the possibilities of what triggered the
massive extinction and any potential kill mechanism must coincide with
this time."

http://www.eurekalert.org/pub_releases/2011-11/uoc-rpd111411.php

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