Scientists set up a glass tube: a marshmallow floated on water inside.
Crows,
then chimps,
then orangutans were shown that dropping rocks made the water rise.
Each species got the marshmallow eventually.
When it was Renée the Raccoon’s turn, she looked at the humans in consternation;
she knew these creatures were daft—but their stupidity today was on another level.
Renée ignored their rocks and climbed the cylinder.
She rocked it to tipping-point, and got her marshmallow the easy, intelligent way.
