Genetic researcher J. Craig Venter is pictured in his office in La Jolla, California in this March 7, 2014 file photo. Venter is teaming up with a unit of United Therapeutics Corp to develop pig lungs... more 
Genetic researcher J. Craig Venter is pictured in his office in La Jolla, California in this March 7, 2014 file photo. Venter is teaming up with a unit of United Therapeutics Corp to develop pig lungs that have been genetically altered to be compatible with humans, a feat that, if successful, could address the urgent need for transplant organs in people end-stage lung disease. REUTERS/Mike Blake/Files (UNITED STATES - Tags: HEALTH SCIENCE TECHNOLOGY SOCIETY HEADSHOT PORTRAIT) less 
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Reuters | Photo By MIKE BLAKE / REUTERS
Tue, May 6, 2014 6:04 AM EDT