Scientists can now measure gravity’s effect on quantum particles, helping to reconcile Einstein’s Relativity and Quantum Mechanics. — Since the beginning of the 20th century, physics has had a major problem: it’s two theories of explaining the universe, General Relativity and Quantum Mechanics, refuse to get along. These two monoliths have achieved unbelievable accuracy explaining everything from planets, stars, and galaxies to quarks, atoms, and molecules, yet they’re…