Clovis Overkill Didn't Wipe Out California's Sea Duck Newswise — Clovis-age natives, often noted for overhunting during their brief dominance in a primitive North America, deserve clemency in the case of California's flightless sea duck. New evidence says it took thousands of years for the duck to die out. A team of six scientists, including Jon M. Erlandson of the University of Oregon, pronounced their verdict in the Proceedings of the National Academy of Sciences (online, March 13) after holding court on thousands of years of archaeological testimony taken from bones of the extinct sea duck uncovered from 14 sites...