https://www.thoughtco.com/aesops-fable-crow-and-pitcher-118590
A Crow perishing with thirst saw a pitcher, and hoping to find water, flew to it with delight. When he reached it, he discovered to his grief that it contained so little water that he could not possibly get at it. He tried everything he could think of to reach the water, but all his efforts were in vain. At last he collected as many stones as he could carry and dropped them one by one with his beak into the pitcher, until he brought the water within his reach and thus saved his life.
Necessity is the mother of invention.
The Crow and the Pitcher and Science
Again and again, historians have noted with wonder that such an ancient tale—already hundreds of years old in Roman times—should document actual crow behavior. Pliny the Elder, in his Natural History (77 A.D.) mentions a crow accomplishing the same feat as the one in Aesop's story. Experiments with rooks (fellow corvids) in 2009 showed that the birds, presented with the same dilemma as the crow in the fable, made use of the same solution. These findings established that tool use in birds was more common than had been supposed, also that the birds would have had to understand the nature of solids and liquids, and further, that some objects (stones, for example) sink while others float.
= new reply since forum marked as read
