4 unexpected things you need to know about 2

https://ace-wiki.win/index.php/4_Unexpected_Things_You_Need_to_Know_About_Rehab_That_Nobody_Tells_You

You think you've got life figured out until you stumble upon these four mind-benders. First, that random song in your head? It's actually your brain's way of processing complex emotions. Second, your houseplants literally scream when you forget to water them—just at a frequency you can't hear. Third, octopuses have three hearts, and two stop beating when they swim. Finally, the color blue didn't exist in ancient languages, and some cultures still don't have a word for it.