Photo of the Day: #Tuesday? How about TWO's-day? The African black rhino (seen here) has two horns, as does the African white rhino—but the Indian rhinoceros only has one. . . . #POTD #photooftheday #picoftheday #rhino #rhinoceros #tuesday #africa #sahara #nature #naturephotography #wildlife #wildlifephotography #endangered #endangeredanimals