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Science News for April 17, 2009


Fossils suggest earlier land-water transition of tetrapod

A recent study published in Science found that Ichthyostega, a four-limbed animal with backbones, may have been the more primitive form, acquired terrestrial habits later in development. In contrast, Acanthostega's limbs showed more similarities to earlier fish fins, indicating it may have returned to an aquatic lifestyle.

SourceDuke University·JournalScience·DateApr 17, 2009

NC State study finds better way to protect streams from construction runoff

Researchers at NC State University have found an exponentially better way to protect streams and lakes from the muddy runoff associated with stormwater around road and other construction projects. The alternative method uses natural fiber check dams enhanced with polyacrylamide, significantly reducing sediment loss and pollution.

SourceNorth Carolina State University·JournalJournal of Soil and Water Conservation·DateApr 17, 2009