Piano keys once had the opposite color layout. In the era... | funfact.wiki | funfact.wiki
Piano keys once had the opposite color layout. In the era of Mozart and Beethoven, wide keys were black and narrow keys white. This was likely because ivory for white keys cost more than ebony for black keys.
An elephant's tusks are not molars but massively overgrown upper incisors — front teeth. The Chinese characters for ivory use the character for "molar," adding to the misconception, but anatomically tusks grow from the front of the jaw.
Hulk from Marvel Comics was originally gray. Stan Lee chose gray as a scary color unrelated to any ethnicity, but a CMYK printing error turned Hulk green in the first comic issue. Lee liked the result and made green Hulks official color.
Humans see three colors; the mantis shrimp sees 16. Most mammals see only two, having lost color receptors during the dinosaur era as nocturnal creatures. Primates alone regained a third through a mutation that helped spot ripe fruit among leaves.