The phrase “odd sympathy” was coined by Dutch mathematician and physicist Christiaan Huygens to describe the tendency of two pendulums mounted on the same beam to end up swinging in exactly opposite directions. Huygens, the inventor of the pendulum clock, at first attributed the effect to air currents, but he dismissed this hypothesis himself after performing several tests. His later hypothesis—confirmed centuries later by Georgia Institute of Technology researchers—attributed it to what? Discuss
Source: The Free Dictionary