It’s quite difficult to get the span of geological time to make sense. In his book In Search of Deep Time, Henry Gee does an excellent job of reminding us just how flimsy the ‘fossil record’ is. A few bones here; a few others five thousand miles away and ten million years later; from these we attempt to tell a story of evolutionary ancestry. It’s like claiming to have reconstructed human history from one flint flake and a half-eaten hamburger. Well, not as coherent as that, actually.
