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New Theory for What Caused Earth's Second-Largest Mass Extinction
10:11 PM
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by
vdmagdalen@gmail.com
Diatoms like this one can be deformed if exposed to high levels of metals in the ocean. New research suggests that lead and other metals caused deformities in prehistoric marine creatures that led to one of the Earth’s biggest mass extinctions.
PHOTOGRAPH BY BILL CURTSINGER, NATIONAL GEOGRAPHIC CREATIVE
By
Cheryl Katz
,
National Geographic
PUBLISHED
SEPTEMBER 11, 2015
http://
on.natgeo.com/1ikomlW
via
@
NatGeo
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