With their spiky horns, adorable ears and wrinkled, armor-like hides, rhinos always make us smile. But the threats against them – primarily poaching and habitat loss – also provoke concern. In honor of World Rhino Day, Africa Expedition Leader Richard de Gouveia reveals all things rhino, from their biology and ecology to the measures conservationists and governments are taking to protect these pachyderms. Plus, find out where to see rhinos in the wild and how sustainable tourism can aid conservation efforts.