Here are some questions scientists still don’t know how to answer, and quite frankly I’m as puzzled as they are!
How frequent is life in the universe? –mfb
We still don’t know what causes stuttering. We can’t point to a brain area and say, “There’s stuttering!” like we can with things like aphasia. –confettispolsion
Why we sleep.
We know what happens when you sleep, we know what happens if you don’t sleep, we don’t know why these things require a sleep state. –ReallyHadToFixThat