Oil is solar powered. If it didn't take so long to form we wouldn't be having the discussion at all. I don't see why you would expect animals to evolve a way

Oil is solar powered. If it didn't take so long to form we wouldn't be having the discussion at all. I don't see why you would expect animals to evolve a way to "capture sunlight" (though some do: http://umich.uloop.com/news/view.php/77109/4-incredible-photosynthetic-animals http://umich.uloop.com/news/view.php/77109/4-incredible-phot...) when it's far more efficient from the standpoint of the animal to eat plant matter.