Eureka (word)
"Eureka" comes from the Ancient Greek word "heúrēka", meaning "I found (it)", which is the first person singular perfect indicative active of the verb "heuriskō" "I find". It is closely related to heuristic, which refers to experience-based techniques for problem solving, learning, and discovery.
Birch
"Betula" species are organised into five subgenera.
"Note: many American texts have "B. pendula" and "B. pubescens" confused, though they are distinct species with different chromosome numbers."The common name "birch" comes from Old English "birce", "bierce", from Proto-Germanic *"berk-jōn" (cf. German "Birke", West Frisian "bjirk"), an adjectival formation from *"berkōn" (cf. Dutch "berk", Low German "Bark", Danish "birk", Norwegian "bjørk"), itself from the Proto-Indo-European root *"bʰerHǵ-" ~ "bʰrHǵ"-, which also gave Lithuanian "béržas", Latvian "Bērzs", Russian "beréza", Ukrainian "beréza", Albanian "bredh" ‘fir’, Ossetian "bærz(æ)", Sanskrit "bhurja", Polish "brzoza", Latin "fraxinus" ‘ash (tree)’. This root is presumably derived from *"bʰreh₁ǵ-" ‘to shine’, in reference to the birch's white bark. The Proto-Germanic rune "berkanan" is named after the birch.