For instance, the Earth going around the Sun instead of vice versa. Or Copernicus starting the Scientific Revolution which eventually brought about the technology - DNA fingerprinting - that could be used to positively identify Copernicus' remains.
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"Here are my two Co
Computerized reconstruction, via BBC
Last week, scientists positively identified the bones of Nicolaus Copernicus, the astronomer credited with scientifically formulating the idea that the universe is heliocentric and prompting the 16th