People who study and care for pigs are curious about how smart they are. Recently,
one team of researchers trained four pigs to use a joystick with their snouts.
The pigs learned to push the joystick up, down, left and right. Then the scientists taught the pigs a simple video game. The pigs looked at a computer screen in front of them. They used the joystick to move a cursor on the screen until it hit a target. When they succeeded, they got treats. They also got praise and petting from the human trainer.