Bats are blind.
"According to the USGS, “No, bats are not blind. Bats have small eyes with very sensitive vision, which helps them see in conditions we might consider pitch black. They don’t have the sharp and colorful vision humans have, but they don’t need that. Think of bat vision as similar to a dark-adapted Mr. Magoo (a cartoon character with very poor vision).”"
Yes. That's because we don't need to. Any new action or sight will be remembered. But if you see it daily you won't.
But that's not the myth. The myth is that we only use 10% and if we somehow could use 100%, we'd all be a genius, get super powers, and whatnot.
We use all of our brain but parts are used more and others less depending on the particular action.
Probably because they play with a lot of friends in a time when the cold goes around. And if even one has it...
Correlation is not causation.