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Old September 11th, 2017 #91
alex revision
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Half-a-billion year old worm fossils shed new light on animal evolution


Scientists have discovered traces of life more than half-a-billion years old that could change the way we think about how all animals evolved on earth.

The international team, including palaeontologists from The University of Manchester, found a new set of trace fossils left by some of the first ever organisms capable of active movement. Trace fossils are the tracks and burrows left by living organisms, not physical remains such as bones or body parts.

http://www.manchester.ac.uk/discover...mal-evolution/