Researchers from Cambridge University found out that the Aesop's fable regarding the thirsty rook that comes across a pitcher of water and then raises the water by dropping stones into the pitcher might really have happened.
The researchers reported that some relatives of crows called rooks in an experiment used the same stone-dropping strategy to get their hands at a worm lying inside a cylinder.
Christopher Bird, the leader of the research team, and his colleagues exposed the rook to a 6-inch plastic cylinder containing water with a worm on its surface.
The rook then used the stone-dropping strategy, slowly but surely getting closer to the prized worm.
Researchers also concluded that the Aesop fable's crow might have actually been a rook, saying that both kinds of birds were called crow during that time.