Update

main.md

@@ -80,6 +80,7 @@ Are you a noob but see our ideas as appealing and would like to join us? Say no
 ## Did You Know
 
 - That [old](old.md) technology (such as toys or alerts in cars) could play prerecorded audio without using any electricity or needing batteries? This was done by [simply](kiss.md) using a plastic disc spinning on a needle (same principle as a vinyl record).
+- That the term "retarded" was actually made as a [politically correct](political_correctness.md) replacement for medical terms such as "idiot", "imbecile" and "moron" which became seen as derogatory.
 - That all [Intel](intel.md) [processors](cpu.md) since 2008 (and [AMD](amd.md) processors since 2013) have a hardware [backdoor](backdoor.md) ([Intel ME](intel_me.md), [AMD PSP](amd_psp.md)) that run the [Minix](minix.md) operating system and allows spying on users of those processors no matter what operating system they run?
 - That Wilhelm Rontgen, a Nobel laureate, did not [patent](patent.md) his groundbreaking discoveries, stating that they should be freely available to anyone without any charge?
 - That brain size correlates with [intelligence](intelligence.md) and male brains are on average 10% larger than those of [women](woman.md)? Yep, this still even on [Wikipedia](wikipedia.md), though the implications mustn't be mentioned there.