
Originally Posted by
panntastic
Why we aren't finding fossilised human:
The fossil record is extremely incomplete, due to the rarity of fossilization occuring. If we had a complete record, many areas of evolutionary theory would be totally different.
Bill Bryson puts this point across brilliantly in "A Short History Of Nearly Everything":
"It isn't easy to become a fossil. The fate of nearly all living organisms - over 99.9 per cent of them - is to compost down to nothingness... even if you make it into the small pool of organisms, the less than 0.1 per cent, that don't get devoured, the chances of being fossilized are very small...
"...Only about one bone in a billion, it is thought, becomes fossilized. If that is so, it means that the complete fossil legacy of all the Americans alive today - that's 270 million people with 206 bones each - will only be about 50 bones, one-quarter of a complete skeleton. That's not to say, of course, that any of these bones will ever actually be found. Bearing in mind that they can be buried anywhere within an area of slighly over 9.3 million square kilometres, little of which will ever be turned over, much less examined, it would be something of a miracle if they ever were. Fossils are in every sense vanishingly rare. Most of what has lived on earth has left behind no record at all. It has been estimated that less than one species in ten thousand has made it into the fossil record. That in itself is a stunningly infinitesimal proprtion.
"...Moreover the record we do have is hopelessly skewed. Most land animals, of course, don't die in sediments. They drop in the open and are eaten or left to rot or weather down to nothing. The fossil record, consequently, is almost absurdly biased in favour of marine creatures. About 95 per cent of all the fossils we possess are of animals that once lived under water, mostly in shallow seas."