"Decades-Long Mystery of Feynman's Sprinkler Problem Finally Solved by Mathematicians"

After decades of debate, a group of mathematicians claim to have finally solved Feynman's sprinkler problem, which asks how a sprinkler head would rotate if it sucked in water instead of expelling it. Using lab experiments and mathematical modeling, they found that a reverse sprinkler spins in the opposite direction when taking in water, due to the collision of incoming water jets generating torque to rotate the hub. The findings could have practical applications in engineering technologies to harvest energy from flowing air or water.