For me it is the fact that our blood contains iron. I earlier used to believe the word stood for some ‘organic element’ since I couldn’t accept we had metal flowing through our supposed carbon-based bodies, till I realized that is where the taste and smell of blood comes from.
doesn’t really fit the thread, but i was surprised when i learned that the empire state building has a blimp docking station
That looks like sea creatures mating
They really thought blimps were gonna be a thing.
They should have been
this is super cool.