The reason for the bite is that it's there for scale, so that a small Apple logo still looks like an apple, and not a cherry! As of why it's an apple? It results in Steve Jobs working in an orchard when he was a boy & decided to name it after his favorite brand of apple, McIntosh. But there might be some hidden story & we may never know!
We do know - we dream because our brain is still active while we are sleeping & to start dreaming, you must be in the REM (Rapid Eye Movement[s]) state of sleep; it is characterized by rapid eye movements, more dreaming & bodily movement, & faster pulse & breathing.
Yes. You're brain is on a roller coaster ride and sending hormones and chemicals all through your body. It is going through the stages of a good night sleep nearly 4-5 times! The deepest stage is Rem like you said when your eyes begin to dart super fast under your eyes. I learned this at a pick a boo kids video called why do we dream
I was at an apple store, and asked a store worker why the iPhone 11 had 3 cameras, and he said something like usually when you zoom in, it just drops the image, but with 3 cameras, itโs like a mini microscope.