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The northern white rhino didnt fail because of evolution.The scientists had the foresight to acquire 300 milliliters of northern white rhino sperm from three males before they died.

space and science stories? Sign up for Mashables weekly Light Speed newsletter.so they instead used eggs from the rhinos closely related subspecies.the researchers will also need to employ sophisticated methods to diversify the rhino genes.

If they bring back two or four.the two remaining northern females arent able to properly reproduce.

is where conservation efforts should be focused -- on existing viable populations -- not those with two inbred females.

but one that the right scientists can perform.are currently unable to challenge any directive affecting to their admission into the United States.

but one that could bridge the vast chasm between legality as it pertains to immigration issues and morality and justice as they pertain to human equality and dignity.The issue of who can contest the denial or revocation of visas and what rights are available to non U.

which lists everything from prostitution to polygamy to terrorist activities as the basis for visa denial.Justices Kennedy and Alito voted with the majority but wrote their own decision which held that even while there may or may not be a liberty interest.