The rise of 'quantum gravity?' Einstein's theory seen in the quantum realm for 1st time

Scientists have directly observed a long-predicted quantum effect of gravity for the first time, providing evidence that Einstein's formulation of gravity operates within the quantum realm. Researchers utilized ultracold atoms to split a quantum wave, keeping one part stationary while the other fell freely under gravity. By reuniting the two parts, they measured the resulting tiny difference, successfully putting one of Einstein's foundational ideas to a striking new test in the quantum world.