# Evolution is internally inconsistent. It posits that all life must continuously improve, but on the other hand, it holds that some creatures, like the horseshoe crab, the alligator, the shark, and the [[coelacanth]],<ref>http://www.dinofish.com/</ref> have remained virtually unchanged for improbably long time periods. | # Evolution is internally inconsistent. It posits that all life must continuously improve, but on the other hand, it holds that some creatures, like the horseshoe crab, the alligator, the shark, and the [[coelacanth]],<ref>http://www.dinofish.com/</ref> have remained virtually unchanged for improbably long time periods. |