Happy exploration.
https://en.wikipedia.org/wiki/Number_sense_in_plants
https://en.wikipedia.org/wiki/Margaret_Howe_Lovatt
https://en.wikipedia.org/wiki/Placebo_button
https://en.wikipedia.org/wiki/Hippasus
https://en.wikipedia.org/wiki/Fallstreak_hole
https://en.wikipedia.org/wiki/Havana_syndrome
https://en.wikipedia.org/wiki/Garden_hermit
https://en.wikipedia.org/wiki/Psychoactive_toad