Robert Maxwell wrote:
It often amazes me how much our knowledge of dinosaurs has changed since I was a kid. When I was born, the idea that dinosaurs were warm-blooded, often feathered, and evolved into birds wasn't generally accepted. These days, it's practically a mundane fact.
Even the asteroid impact that wiped most of them out wasn't even a theory until 1980, when I was in Kindergarten.
Although we also have to keep in mind that not all dinosaurs had feathers, and not all evolved into birds. They were a hugely diverse group of animals. I do remember seeing many years ago a fossil that had an imprint of dinosaur skin (unknown which dinosaur), and it looked bumpy like a collection of gravel, and definitely didn't have feathers.