A finger of purple bacteria sticks up from the bottom of a lakebed
Longer Days Led to Oxygen Buildup on Early Earth: Study
Researchers propose that some of the planet’s earliest photosynthesizers benefited from a slowing of the Earth’s rotation that allowed them to produce a surplus of oxygen and paved the way for more complex life.  
ABOVE: Phil Hartmeyer, NOAA Thunder Bay National Marine Sanctuary
Longer Days Led to Oxygen Buildup on Early Earth: Study
Longer Days Led to Oxygen Buildup on Early Earth: Study

Researchers propose that some of the planet’s earliest photosynthesizers benefited from a slowing of the Earth’s rotation that allowed them to produce a surplus of oxygen and paved the way for more complex life.  

Researchers propose that some of the planet’s earliest photosynthesizers benefited from a slowing of the Earth’s rotation that allowed them to produce a surplus of oxygen and paved the way for more complex life.  

ABOVE: Phil Hartmeyer, NOAA Thunder Bay National Marine Sanctuary
evolutionary time
There and Back Again
Sabrina Richards | Feb 1, 2012
A new study estimates the number of generations necessary to evolve from mouse-sized to elephantine, and shows that it’s quicker to get small.