In its youth the flat-fish is symmetrical with one eye on each side. However, as the body matures, one eye “begins to glide slowly round the head.” Read More ›
While these theories may appear reasonable, given the complexity of the behavior it is unclear how a Darwinian process can be a plausible explanation. Read More ›
Scientists debate whether ctenophores are the earliest animals to appear in the Cambrian explosion. If so, they arrived with multiple tissues, a nervous system, and a digestive system. Read More ›
