The tiny remains of an extinct bug-like creature discovered at British Columbia’s 500-million-year-old Burgess Shale fossil deposit add a new branch to the evolutionary tree of life, says a PhD student Joe Moysiuk, who tracked down the organism’s development.

The discovery of fossilized soft tissue, including the unique digestive tract, antennae and appendages of extinct agnostids help solve a long-standing evolutionary riddle about the agnostids’ family tree.

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