Anaxagoras
Banned
The problem with technologically-based PODs is that having the necessary knowledge and information to invent something is only part of it - there also has to be some conceivable need for it. Heron of Alexandria invented a steam engine around 200 BC, but it never went anywhere because no one could think of what they might do with it.
Even assuming that Leonardo da Vinci's ideas were plausible, what possible use is a primitive screw helicopter to someone in Renaissance Italy?
Even assuming that Leonardo da Vinci's ideas were plausible, what possible use is a primitive screw helicopter to someone in Renaissance Italy?