Transcription: Ever ask yourself why fish don't look like monkeys? And why do elephants have baby elephants, not baby frogs? Or even baby frogephants? Why, why, why? Well, let's start with an experiment that a guy called Hans Dreich, a brilliant experimenter, did in the 1890s. Everybody knew that frogs started out as a single cell, a frog embryo, which grew and the cells divided until it became a frog. Dreich took a frog embryo when it was just two cells and then he used a child's hair, technical stuff this, to loop around the embryo and force the two cells to separate. So he had two separate single cells. N ...
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