Origins of life

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 since 18 June 1999 

These are lecture notes from an experimental non-majors biology class taught in 1995 by Bruce Walsh, University of Arizona. Other lectures of potential interest:

  • Extinctions
  • Cosmic impacts and life on Earth
  • Genetics class lecture notes

    Useful references

    Part 1: Origins of Earth

    Part 2: The appearance of Life

    Part 3: The fossil record relating to the origins of life

    Part 4: Experimental studies of the origins of life


  • Key steps in the origins of life (leading up to the first cell)
  • Problems the first cells had to solve