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Originally Posted by ianathuth
We may not have been keeping detailed records ourselves for that long globally but some areas have records going back quite a long way. I said ourselves because Mother Nature keeps records for us which we can recover via analysis of ice cores and tree rings amongst other things.
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Yes, but noone told the scientists what to look for, and what it means. They learn as the go along. Science is the following stages in this order:
1. Observing some phenomena
2. Forming a hypothesis about it (which may or may not be correct)
3. Trying to prove it, normally by prototyping, or re-enactment
4. Trying to disprove it.
5. Go to 1,
Wtih global warming, we are still at step #3 and at an early stage at that. Scientists notice something, and can suppose what it means, but they can't prove it yet - how do you set up an ice age as an experiment? Scientists may be able to do stage 3 to some extend, but they can't do stage 4, which is basically to prove or disprove that global warming is a natural temperature change.
Scientists really don't get things right on the first attempt much. They said the lowest level you can do to is a molecule. Then they discovered the atom. They said that it couldn't be split. Then they split the atom. Then they said that is as low as they'll ever go. Then they split the proton and discovered the Quark. They say that is indivisible, but they'll probably split that too sometime.