Zoo's bid to mate Rhino siblings

With the survival of a species on the line, Cincinnati Zoo scientists are hoping to mate their lone female Sumatran rhino with her brother.

The breeding effort with the rhino siblings follows a recent crisis summit in Singapore where conservationists concluded as few as 100 of the two-horned, hairy rhinos might remain in their native south-east Asia. The species numbers have fallen by up to 90% since the mid-1980s as development takes away habitat space and poachers hunt them for their prized horns.