What is the world actually made of?

Ways through

Two routes, each starting somewhere different. Nothing here is a prerequisite for anything else, and every question stands on its own. A stop opened from a route carries it: the foot of the question offers the next one.

1. What a measurement is

   The experiments first, and the interpretations last, once it is clear what any of them has to account for.

   Take this route

   1. 01What actually happens when we look?
   2. 02Can two things be connected across any distance?
   3. 03Is anything truly random?
   4. 04How big can something be and still be quantum?
   5. 05What does quantum mechanics mean?

2. The bottom of things

   Empty space and information, then the smallest length, black holes and time, where quantum theory and gravity meet and no tested theory joins them, and last, why there is anything at all.

   Take this route

   1. 01Is empty space empty?
   2. 02Does information weigh anything?
   3. 03Is there a smallest length?
   4. 04Where does information go in a black hole?
   5. 05Is time fundamental?
   6. 06Why is there anything at all?