Don_Dickle@lemmy.world to Today I Learned@lemmy.worldEnglish · 1 年前TIL there are three types of tears: basal, reflex, and psychic. Psychic tears, produced when we're sad, contain leucine enkephalin, a natural painkiller that helps us feel better.en.wikipedia.orgexternal-linkmessage-square20fedilinkarrow-up1285arrow-down16
arrow-up1279arrow-down1external-linkTIL there are three types of tears: basal, reflex, and psychic. Psychic tears, produced when we're sad, contain leucine enkephalin, a natural painkiller that helps us feel better.en.wikipedia.orgDon_Dickle@lemmy.world to Today I Learned@lemmy.worldEnglish · 1 年前message-square20fedilink
minus-squareAwesomeLowlander@lemmy.dbzer0.comlinkfedilinkEnglisharrow-up15·1 年前Why do we need to excrete the tears before reabsorbing them, instead of just producing and consuming them internally?
minus-squareSparrowRanjitScaur@lemmy.worldlinkfedilinkEnglisharrow-up9·1 年前Maybe as a social signal for other humans.
minus-squaredelirious_owl@discuss.onlinelinkfedilinkEnglisharrow-up8·edit-21 年前And that, children, is how humans began to produce internal heroin in the dawn of the geneic era in the 2030s
minus-squareAwesomeLowlander@lemmy.dbzer0.comlinkfedilinkEnglisharrow-up4·1 年前We already do, it’s called dopamine
Why do we need to excrete the tears before reabsorbing them, instead of just producing and consuming them internally?
Maybe as a social signal for other humans.
And that, children, is how humans began to produce internal heroin in the dawn of the geneic era in the 2030s
We already do, it’s called dopamine