48 of the Most Urgent, Fascinating, and Yet Unanswered Questions Ever Asked

The Last Unknowns is a book made up almost entirely of questions. Personally, I hope that most of these get answered sooner rather than later, but for right now, you can keep yourself up at night with questions like, “What is the hard limit on human longevity?” and “What future progressive norms would most forward-thinking people today dismiss as too…