5. The Evidence for the Theory is Irrefutable ==>
   5.2. Circumstancial Evidence ==>

5.2.3. Embryological Evidence

Embryological Evidence

E.g. Legs on dolphin embryos; tails and gill folds on human embryos; snake embryos with legs; marsupial eggshell and carnuncle

See the "Zoo In You" http://www.pbs.org/wgbh/nova/beta/evolution/zoo-you.html

an interactive presentation that shows how similar we are to other species..