A new study shows that kangaroos can communicate with humans. Researchers from Australia and the United Kingdom trained 11 kangaroos to get food out of an open box—and then closed the box with food still inside. Unable to open it, almost all of the marsupials gazed at a nearby researcher. Many then looked back at the box. Some kangaroos even scratched at the human. Researchers say this behavior challenges the theory that only domesticated animals, such as dogs, seek assistance from people.