Defining the start of life (Introduction)
by David Turell 
, Wednesday, December 11, 2013, 19:51 (4000 days ago)
It seems from gene studies only archaea and bacteria started life and combined to create Eukaryotes (nucleated cellular organisms).:-http://www.nature.com/nature/journal/v504/n7479/full/nature12779.html?WT.ec_id=NATURE-20131212