Year in review: Microbe discoveries spur rethink of treetop of life

Scientists consider deep history of eukaryotes

hydrothermal vents

LIFE STORIES  DNA samples of microbes discovered near hydrothermal vents like this one in the Arctic Mid-Ocean Ridge may be the closest kin yet known to complex life.

R.B. PEDERSEN/CENTRE FOR GEOBIOLOGY/UNIV. OF BERGEN

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