Chemical analysis of fossil tooth enamel from extinct marsupials that lived in what is now southeastern Queensland 5 to 2.5 million years ago has revealed their diet and habitats. This image shows extinct marsupials from the Pliocene of Australia: the kangaroo Protemnodon and the large marsupial herbivore Euryzygoma dunense in the background (Protemnodon by Nobu Tamura / CC BY 3.0; Euryzygoma by Anne Musser / © Australian Museum) Scientists led by...