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If 19th-century science is defined by certainty, the experiments with advanced technology and the scientific studies would have been the poof of certainty.
19th century was a period when many ideas, theories and inventions were developing. This era was also known as a modern era of science. The result of the discovering and experimenting would have been recorded in the Journal, some of them still exist. So, there wouldn't have been any loss, whatever the scientists were putting forward were seen in the public. Some of the examples are the Steam Engine, Charles Darwin Theories, telegraph and telephone, medicines.
We knew that Paleo Indians were in the Americas through the style commonly shared by individual groups called stone tool production. This lithic reduction tool adaptations were found throughout Americas. Paleo-Indianas as well were thought to have migrated throughout the Americas, showing variations of lifestyles across the geographic areas. There were even areas or sites noting this, for example in Alaska, northern British Columbia, and western Alberta.
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