Krill Killers

Before whales, when dinosaurs roamed the Earth, giant filter-feeding fish swam the prehistoric seas. By going back and searching through museums for misunderstood or overlooked fossils, a researcher found evidence that these fish existed for more than 100 million years — far longer than scientists had previously thought.

Audio: NPR's All Things Considered 2/19/10, Host: Robert Siegel, Reporter: Nell Greenfieldboyce, Image: Robert Nicholls, http://www.paleocreations.com/