For hundreds of years, many outstanding figures in human history have devoted the best years of their lives to searching for something they didn't even know what it looked like exactly. We're talking, of course, about the Holy Grail - now we talk about it as something unattainable but beautiful - but in the Middle Ages, knights and sages of Europe really did search for it!
Which is not surprising, they didn't find it then, and they're unlikely to ever find it. Nevertheless, people sincerely believed that the Holy Grail existed. However, if we say that people were full of delusions back then, and today everything is different, then we'll most likely be wrong. After all, even today, there are many made-up things that people keep believing in without any reason.
More info: Reddit
#22
The idea that you are entitled to exactly one phone call if they take you to jail. That's never been a thing.
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38points
#24
Frog in a boiling pot will jump out no matter how slowly you turn up the heat. The study where this comes from required the frog to be lobotomized before it didn't jump out.
34points
#25
That if you touch a bird nest, the mother will abandon it.
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33points
#27
There being a physical Underground Railroad (like a subway system) that black people traveled through to go north and escape slavery.
26points
#28
The idea that life has a clear timeline or set path lol sorry love It doesn’t.
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23points
#29
Acupuncture, homoeopathy, most chiropractic, (insert more snake oil "medical" or fad heath thing here).
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6points
#30
Those AI pictures that our boomer parents like to share on Facebook.
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-15points