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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Marsupials join - 140mya

Marsupials are an infraclass of mammals living primarily in the Southern Hemisphere; a distinctive characteristic, common to most species, is that the young are carried in a pouch. Well-known marsupials include kangarooskoalaspossumsopossumswombats and the Tasmanian devil. Marsupials represent the clade originating with the last common ancestor of extant metatherians. Like other mammals in the Metatheria, they are characterized by giving birth to relatively undeveloped young, often residing in a pouch with the parent for a certain time after birth. Close to 70% of the 334 extantspecies occur in AustraliaNew Guinea, and nearby islands, with the remaining 100 found in the Americas, primarily in South America, but with thirteen in Central America, and one in North America, north of Mexico.

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