Yes, I remember that.
They also predicted a new Ice Age would take place by now. Then fifty years went by and it suddenly became global warming.
I remember those same lessons in school too. I had the Golden Book Encyclopedia)I believe that’s what it was called) that showed dinosaurs as great, lumbering beasts complete with a Brontosaurus floating in a swamp and a T Rex lumbering around like a guy in a cheap Godzilla type get up.