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I was once a Geologist. The trick with geology is time. Imagine that if, every year, a stream were to cut a groove 1 millimetre in the ground. In two years the groove would be 2 mm deep and in 10 years it would be a centimetre deep. If the stream were to follow the same line for a million years the groove would be a kilometre deep. Just for my mum make it a sixteenth of an inch a year and the valley would be nearly a mile deep. Now the earth is about four and a half billion years old. Just in case you're never sure what a billion is nowadays that would be 4,500,000,000 years. Obviously it's not possible but if our 1 mm a year stream flowed, non stop, in the same place, from the beginning, the groove would be 4,500 kilometres deep or about 500 times as deep as Mount Everest is high. When I studied geology I found out about graptolites, brachiopods, lamellibranchs, belemnites and all sorts of other fossils large and small. I particularly approved of trilobites. I thought th...