(zealouts also said)
<quote>
1) Trains would never work as you'd die from asphyxia
2) Cars would never replace the horse and cart
3) Man would never fly
</quote>
4) iron ships can't float
5) heavy objects fall faster than light ones
6) the earth is the center of the universe
and so on, yeah.
I still like the idea that spinning "stuff" might emit gravitons, or SOME kind of particle, and especially good if it can be used for propulsion. Lots of early work involving that concept... and even more recent contributions...
https://en.wikipedia.org/wiki/Ehrenfest_paradox
after all, relativistic effects gotta do SOMETHING... Bremsstrahlung at the very least
https://en.wikipedia.org/wiki/Bremsstrahlung