In 1965 the best and unanimous science held that birth of a hazel eyed child to two blue eyed parents proved infidelity of the mother or a child swap at the hospital.
Today's science says that is eyewash.
More recently it was held that a fatty diet and all cholesterol were bad.
Today's science denies that.
Not everything supported by scientific consensus is equally secure.
That the Earth is roughly round and heliocentrism is inadequate are ideas that are probably secure.
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