Researchers uncover three kangaroos 'of gigantic proportions'

Palaeontologists at South Australia's Flinders University have discovered three historic species of giant kangaroo native to Australia and New Guinea. The giant kangaroos - called 'Protemnodon'- are megafauna that roamed the earth between five million until 40 thousand years ago. The research solves a scientific puzzle about how many species of these giants existed.