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Research

A University of Washington research team has captured color photographs of what could be a previously undocumented species of chambered nautilus, a cephalopod mollusk often classified as a “living fossil,” in the waters off American Samoa in the South Pacific. “This is certainly a new taxon, but we are not sure if it is a new species, subspecies or variety,” said UW paleontologist Peter Ward, who led the expedition to Samoa and Fiji. “The Samoan nautiluses are large for the…

New work in Argentina where scientists had previously thought Earth’s first grasslands emerged 38 million years ago, shows the area at the time covered with tropical forests rich with palms, bamboos and gingers. Grit and volcanic ash in those forests could have caused the evolution of teeth in horse-like animals that scientists mistakenly thought were adaptations in response to emerging grasslands.