In the 1960s, we were taught in grade school that American Bison (called buffalos) were extinct. You can’t really blame the teachers for this one: the Encyclopedia Britannica said the same at the time.
In 1972, my family’s first trip to Yellowstone Nat’l Park, I was informed that bison were endangered.
In 1974, they were apparently so unendangered any more that Mom was able to buy us “buffalo burgers” at a fair in Washington State.
Sometime in the early 2000s someone started farming bison outside of Grand Rapids, Michigan, near the home of one of my cousins. Still see them wandering around when we go that way. I was unable to tell a child whether they “moo”.
They got me with that in the 1970s. In grade 5, a weird male teacher, in hindsight obviously gay, insisted the National Socialist German Workers' Party wasn't really socialist. Schools still tell that lie today, despite the Nazi plank almost identical to the modern Demonrat plank, down to the animus towards Jews.
That’s true. Ornery critters.