Question: things that are ahead of their time?
Answer: Contact lenses – 1632. YouTube. ...  Solar cells – 1883. ...  Vending machine – some time in the first century. ...  Military mind control – right now! ...  Mercedes Biome – right now! ...  Difference engine – 1822. ...  Electric car – 1828. ...  Flushing toilets – 18th century BC.