What are the basic building blocks of the cosmos? Atoms, particles, mass energy? Quantum mechanics, forces, fields? Space and time — space-time? Tiny strings with many dimensions?
A new candidate is “information,” which some scientists claim is the foundation of reality. The late distinguished physicist John Archibald Wheeler characterized the idea as “It from bit” — “it” referring to all the stuff of the universe and “bit” meaning information.
So here’s the deep question: Is information the ultimate constituent from which the cosmos is constructed? I started as a skeptic. Information as reality seems so outlandish, so trendy — a metaphor on steroids.