Layers of fossils in pillars, the rock covering them is dated and we get an exact time of each layer.
Each bone has a humerus. The ones that have these bones are humans, lions and birds
Oswald Avery in 1944 discoveries DNA was responsible for storing and passing information throughout generations
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may be they are history and geography
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the best thing for them to do is get all three i suppose considering it is all one plant
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