John Hume has been trying to save the white rhinos of South Africa before they're poached into extinction. Now, he says, he can't afford the upkeep of his crusade.
On Wednesday, Hume, who is estimated to own somewhere between 13% to 15% of the world's white rhinos, launched an auction to sell off the 2,000-strong herd in an online sale that's starting at $10 million.
