> This is why they like Dark mater, dark energy, many worlds. Spooky action at a distance, string theory. You are mixing apples and oranges. -Dark matter: Obs

> This is why they like Dark mater, dark energy, many worlds. Spooky action at a distance, string theory. You are mixing apples and oranges. -Dark matter: Observed phenomena, unexplained yet. Understanding of it is so little that mathematical beauty is a secondary concern. -Dark energy: Observed phenomena, multiple conflicting explanations with huge calculation mismatch. Einstein already said dips on this with his cosmological constant. -Many worlds: Unobserved and lacks a definitive consensus of what it could look like. -Spooky action at a distance (entanglement): Observed and understood with incredible accuracy. Remaining questions are more philosophical than scientific unless we understand other not yet solved problems. -String theory: This is an umbrella term for multiple theories, finally unified (kinda) under M-theory. Whether they are true or not doesn't change the fact that thinking about them has improved mathematics itself immensely. Leonard Susskind says string theory has been the best "calculator" ever invented to understand complex geometry spacetime "might" have. When the time we understand how silly we were with our guesses comes and these theories become obsolete, it still will not prove that thinking about them were a useless enterprise.