Gravity is like a stretched trampoline: massive bodies press into it, making other bodies roll toward them. This shared curvature of space, gravity, affects everyone, but it doesn't convey secret messages. For quantum entanglement to arise, an exchange of special particles is needed, as if the balls on the trampoline were tossing smaller balls back and forth to synchronize.

In the quantum world, such tricks work thanks to mediators, like particles of the Standard Model. Even gravitational waves, ripples from the motion of massive bodies, don't carry quantum instructions. A recent study claimed the opposite, but a new analysis found an error: they didn't account for all the dents in the trampoline: they overlooked small but crucial ones. It's like trying to assemble a puzzle without the corner pieces. But here's the striking bit: even if you place a mass as big as Everest on the trampoline, gravity won't entangle the particles. For that, the quantum nature of spacetime itself is required.