| − | Molecular and morphological evidence point to [[hyrax|hyraxes]] and [[Sirenia|sirenians]] (sea cows and manatees) as the most similar living creatured to elephants<ref>Hidenori Nishihara et al. A Retroposon Analysis of Afrotherian Phylogeny. ''Molecular Biology and Evolution'' '''22''': 1823-1833,</ref>, and these groups are hypothesized by evolutionists to have shared a common ancestor approximately 50 million years ago. The three extant species of elephant are sole survivors of a much more diverse Proboscidian fauna with some 170 described [[fossil]] species and including species of [[mammoth]] from [[North America]] and the massive ''Deinotherium'', the second largest land mammal that ever lived, which sported two downward facing tusks. | + | Molecular and morphological evidence point to [[hyrax|hyraxes]] and [[Sirenia|sirenians]] (sea cows and manatees) as the most similar living creatures to elephants<ref>Hidenori Nishihara et al. A Retroposon Analysis of Afrotherian Phylogeny. ''Molecular Biology and Evolution'' '''22''': 1823-1833,</ref>, and these groups are hypothesized by evolutionists to have shared a common ancestor approximately 50 million years ago. The three extant species of elephant are sole survivors of a much more diverse Proboscidian fauna with some 170 described [[fossil]] species and including species of [[mammoth]] from [[North America]] and the massive ''Deinotherium'', the second largest land mammal that ever lived, which sported two downward facing tusks. |