Skull of Barbourofelis, extinct carnivorous mammals which lived during the Miocene to 6 mio years ago) in North America. For a parallel evolution phenomenon, the appearance of this predator reminded very much the saber-toothed tigers.
Skeleton of mother and baby, who both died during birth. My mother's mother died giving birth to her 8 th child so I guess her skeleton must look like this because the baby died inside of her. How very sad for my Mom to grow up without a mother.
rare narwhal skull with double tusks. Narwhals, a rare variety of arctic whale, are known for their long singular tusks - biologists estimate that double tusks only occur in one in a thousand narwhals; they are uncertain why this phenomenon exists.