Ancient Louse / Present-Day Louse (image) University of Illinois at Urbana-Champaign Caption This 44-million-year-old louse fossil (left), discovered by co-author Vincent Smith and described in a paper in Biology Letters in 2004, helped the researchers anchor the lineages of lice that today parasitize aquatic birds (right). Credit Vincent S. Smith Usage Restrictions Photo may be used only with stories about the research described in the news release. Please credit: Vincent S. Smith Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.