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they use signs

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people are saying we guessed but that is not true we fond evidence

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technically it wasn't writing they were pictures .

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we discovered the remains

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i also think that because they leave footprints of their DNA and they detectives look and run tests on it ad inform us on it like in the news and in articles on line and other stuff like that and that is some more reasons why i think that we know about the prehistoric ages!!!

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they could be wrong because if you weren't alive how do they know it was not invinted

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I think we know because we have fossils and evidance Left behind from pre-historic animals.

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the historians could tell us

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i think we know because
they use sign laugiuge

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we guessed.

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we know what they eat because we find bodies with food in them

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they find fossils

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I think we wouldn't know because there is no writing. But if someone saw we would know.

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I think we know dinosaurs exist because of the fossils of the fossils they left behind. We also know about cavemen because of mainly Otzi because he told a lot about weapons and food and clothing and especially what cavemen looked like

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I think we know because  since both the time of settlement of modern humans and the evolution of human civilization, differ from region to region, prehistory starts and ends at different moments in time, depending on the region concerned.

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we find the dino bones

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I think we know because the cave people drew pictures of what things looked like and what has happened.

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i think we know because of all the cave people homes and drawing

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they might be wrong

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I think we know because of fossils and other thing found in the ground like dinosaurs bones and plants also minerals.

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I think we know because people leave evidence like weapons and clothing and stuff that tells their life and the time that they lived and also they investigators that look and detect stuff like that they kind of work it out and write stories and articles about the facts that they find out.So that is why i think that we know all of these facts and evidence about the stone age and prehistoric time and etc.

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They have evidence like in otzi he had weapons and when he died they found weapons scattered around and a bow n arrow in his shoulder which told us he got killed by someone. and there was also blood on a knife and he stabbed someone an d their was dry blood on it which is evidence that he killed someone or something. and also caveman could kind of communicate so they would come up with names for things. and etc.

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I think we would know because of body's like Otzi.  We found out they had copper back then by his axe. If we didn't have writing we would still find out about dinosaurs. Because we have found the dinosaur bones. So we don't really need writing when we have research!

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I think we know because of pictures and footprints left behind and belongs too. We also know because we can the plants that they used and we can also say how they treated it.