tom swift among the diamond makers

so their is this experiment where they look at the leg bones of some different animals and saprsingly they are about the same i cannt say much about this but because you have to see the picture but it seemed he bigger the animal the bigger they were an had ore bones which i think is actually not very interesting just  because you would think the bigger animal would have more bones theree wher four contestants and i think they are al, prehistoric ahhipppis is the ancestor of all horses that is what they were doing they got bigger and bigger.