Another example is how we treat lice on Shabbos. We follow Chazal, not modern scientists.
Please explain
Halachically, a louse is allowed to be killed on Shabbos, since it is “spontaneously generated”.
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Even though we now know that lice are not “spontaneously generated”, none the less since Chazal said it was muttar we don’t have the ability to change the Halacha.
A similar concept (IIRC) exists by Treifos, where even though we now know that many Treifah can live more than 12 months, once Chazal declared a defect to be a Treifah the classification remains.