It depends what you mean...whether more scientific or mechanical....if scientific, then I would say realizing that spontaneous generation was not a valid belief, and the effect that germs have on us, sort of like you said. As for technological advances, definitely everything connected with computers and music. That is answered without deep thought though, so I am afraid it may seem petty or something...
Same question, I'd like to hear more answers: Which technological advances do you think have benefited mankind the most?

