Say hello to your greatest grandparent. Cute, furry, long-tailed and with a penchant for insects – it sounds like something we would keep as a pet rather than be related to. But it seems that such a creature was the last shared ancestor of placental mammals – a group including all living mammals apart from marsupials and those that lay eggs.
Meet our earliest common mammalian ancestor - life - 07 February 2013 - New Scientist
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