2017 Ancestor's Trail Hike   
in memory of Rob Stewart

Tracing our common ancestry with all other multicellular life 
over the last billion years of evolutionary time. 
A 12.5k hike where each average stride = 60,000 years. 
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Placozoans, 780mya

The Placozoa are a basal form of invertebrate. They are the simplest in structure of all non-parasitic multicellular animals (Metazoa). They are generally classified as a single species, Trichoplax adhaerens, although there is enough genetic diversity that it is likely that there are multiple, morphologically similar species. Although they were first discovered in 1883, a common name does not yet exist for the taxon; the scientific name literally means "flat animals".

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