NANYUKI, Kenya - The last two northern white rhinoceroses in the world live near Nairobi, Kenya where they armed guards from the country's anti-poaching police force protect them 24 hours a day. Najin and Fatu graze through savannah grasslands in the 140-square-mile Ol Pejeta conservancy. The two females don't seem aware that they're the last of their kind, even though […]