u/watoermaloen

I've heard lots of people talking about black sheep (i.e "the black sheep of the flock"), but in all my life, I've never seen anything made out of black wool. It's always either white or dyed a different colour. Do black sheep just produce white wool, or does their black wool get bleached white because white wool's worth more?

Just randomly had this thought while I was walking home. Calendars were invented around that time, which means they had to have somehow known how long a year was back then. They were still following the geocentric model back then, I remember hearing in middle school about how Aristotle was jailed for promoting the heliocentric model. They didn't know anything about space besides the moon, the sun and the stars, and yet somehow they knew exactly how long the years were. How?