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It's already known domesticated animals like dogs and even horses are resigned to using powerful eye contact due to their inability to point with arms or legs like primates.
Now, this study shows kangaroos – marsupial mammals that have never been domesticated – do the same.
'Their gaze was pretty intense,' said co-author Dr Alexandra Green, a post-doctoral researcher in the Sydney School of Veterinary Science at University of Sydney.
'We’ve previously thought only domesticated animals try to ask for help with a problem, but kangaroos do it too.
'If they can’t open the box, they look at the human and back to the container.