X-ray microtomography of fossilized tunnel-like burrows (multi-colored) in sediment, left by ancient creatures akin to roundworms during the Ediacaran-Cambrian transition. LUKE PARRY, UNIVERSITY OF BRISTOL See L.A. Parry et al., “Ichnological evidence for meiofaunal bilaterians from the terminal Ediacaran and earliest Cambrian of Brazil,” Nature Ecology & Evolution, doi:10.1038/s41559-017-0301-9, 2017.
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