Fossil evidence for evolution. Certain rock layers contain numerous different fossilised organisms not found in the layers below them. Cambrian rock is a good example of this. Cambrian fossils are all fully-formed species - no intermediates. The layers underneath have no intermediates either, nor evidence of erosion which would suggest missing rock layers. The fully-formed species just suddenly appear in the so-called "Cambrian Explosion". Where are the intermediate fossils? What does this mean for evolution?
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