There is an Easter Egg in Notes. If you can get a magnified view of the the icon for the Notes app, you will see that the scribbling shown on the notepad is a tribute to the ancient but famous "The Crazy Ones" Apple TV ad from the late nineties – part of the "Think Different" ad campaign. The text reads:
"Here’s to the crazy ones.
The misfits. The rebels.
The round pegs in the square holes.
The ones who see things different.
They’re not fond of rules,
and they have no respect for the status quo."
Hat tip MacObserver
"I think it’s probably a survival skill that we’re curious and like to explore. Our ancestors, who were incurious and failed to explore, probably didn’t live as long as the ones who were looking over the next mountain range to see if there were more sources of food and better climates and so on and so on.
We are really evolved to be pioneers. For good reason. New worlds have a way of — you can’t predict how or why or when — but new worlds have a way of saving old worlds. That’s how it should be. We need the frontier. We need the people moving out into space."