It turns out that the saying “cry me a river” suggests a task that couldn’t be accomplished even if everyone on the planet worked together to accomplish it.
If all the people on Earth cried, it would be impossible for them to match the volume of water in even a very small river, student scientists at the University of Leicester have calculated.
However, an Olympic-sized swimming pool could be filled with tears— as long as each human shed about 55 of them, they estimated.
