this post was submitted on 08 Sep 2023
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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.

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[โ€“] Elon_Musk@hexbear.net 28 points 1 year ago* (last edited 1 year ago) (5 children)

The speed of advancement from the industrial revolution to present.

The relatively short time humanity has been around

The universe is finite but expanding

The Monty Hall problem

The absolute scale of devastation created by humanity

[โ€“] eXAt@hexbear.net 6 points 1 year ago* (last edited 1 year ago)

I may be wrong but I thought it was generally believed that the Universe is infinite (or at least that that was the most common belief among those that are qualified in the field)

Edit: I mean infinite in Space, of course it hasn't existed forever

Edit2: I quickly read this article https://www.swinburne.edu.au/news/2021/08/Is-space-infinite-we-asked-5-experts/ where the 3 astronomers answered maybe, yes, and yes. Whereas the two non-astronomers answered no. Since this seems to agree with me I will believe that this is correct and not investigate further

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