July 7, 2010

- The New York Time

July 7, 2010

May 7, 2010

May 6, 2010

April 9, 2010

March 26, 2010

- Talk of the Nation, NPR

March 24, 2010

March 24, 2010

- Time

March 24, 2010

- Science News

November 24, 2009

October 2, 2009

September 3, 2009

June 24, 2009

- All Things Considered, NPR

July 28, 2008

- LiveScience

September 20, 2007

- The New York Times

February 23, 2007

February 9, 2007

February 9, 2007

February 7, 2007