Sometimes what we don’t know is more interesting than what we do. I’m always confounded when I hear people lay out confident scenarios for the human future, each different from the next, when we’re still at a stage where we don’t even know what the universe is made of. While we’re figuring out dark matter and (even worse) dark energy, we can answer some of the other big questions looked at in this article in Wired. What happens to information in a black hole? What causes gravity? How do entangled particles communicate? Some significant names tackle these questions — not all cosmological by any means — in entertaining form.