precambrian-era

Precambrian Era

Bakker blogs: Bulldozer worms and the end of peace on the ocean floor
May 24, 2012 · Be The First To Comment

Life first evolved about 3.5 billion years ago, at the beginning of the Precambrian Eras. At first, life was made up of simple microbes (bacteria) that could survive horrible conditions, including acid oceans and no oxygen in the air or water. For 2.7 billion years, the sea bottom remained (mostly) peaceful, quiet and flat. Microbes […]



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