Patricia A. Beddows, Northwestern University (image) Northwestern University Share Print E-Mail Caption Cave-diving scientist Patricia A. Beddows of Northwestern University is pictured in the technical SCUBA gear she uses to access the flooded cave systems in Mexico's Yucatán Peninsula. She is a contributing scientist for the Hoyo Negro site, where one of the oldest human skeletons in North America was found alongside at least 16 other animal species. Credit Credit: E. Monroy-Rios Usage Restrictions Must identify Patricia A. Beddows of Northwestern University and must include credit. Share Print E-Mail 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.