The edges of perception. Sci fi concepts
Blind spots in human consciousness.
Light spectrum vision.
Behind us
Where we don't care to look
Eachothers thoughts (can Christopher Nolan do a remake of that Mel Gibson movie?)
Details of memories
The future
One place at a time
One thought at a time
The "laws" or "theories" of the universe
Social structures
Parts vs whole/forest for trees
How Things Work
Chance