ELI5 Decaf - how did a train accident lead to its discovery?

ELI5 Explain Like I'm 5: Bite sized answers to stuff you should know about - in a mini podcast

How is it possible to get the caffeine out of coffee beans? How was the process accidentally discovered? What percentage of caffeine needs to be removed for it to be considered decaf? Is it true that coffee makes you want to go to the toilet?

... we explain like I'm five

Thank you to the r/explainlikeimfive community and in particular the following users whose questions and comments formed the basis of this discussion: realnotfake, subzerot, another1mitesthedust, darthvirgin, gregw134, brackattack27, yalloc, gnonthgol and jwstap

To the ELI5 community that has supported us so far, thanks for all your feedback and comments. Join us on Twitter:

https://www.twitter.com/eli5ThePodcast/

or send us an e-mail:

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