Have you ever seen magpies play-fighting with one another, or rolling around in high spirits? Or an apostlebird running at full speed with a stick in its beak, chased by a troop of other apostlebirds? Well, such play behavior may be associated with a larger brain and a longer life.
Click here for original story, Birds that play with others have the biggest brains—and the same may go for humans
Source: Phys.org