Forensic worker Rayo Del Carmen Ochoa examines DNA samples to help identify corpses, in the Mexican forensic building in Mexico City (REUTERS/Henry Romero).
Opinion
Wanted: A Noah's Ark for Species' DNA
April 25, 2013, William Y. Brown
William Y. Brown argues that genetic libraries would preserve the DNA of known species for research and commerce as well as offer the potential to restore species that have gone extinct.