• Question: How do you believe life started? (E.g. Big Bang theory)

    Asked by Alita to Oliver, Jordan, David on 15 Mar 2019.
    • Photo: David Sünderhauf

      David Sünderhauf answered on 15 Mar 2019:


      I love this question! The Big Bang theory describes how the universe started, and how matter & particles came into existence. These then formed stars & later planets, including planet earth.
      .
      The start of life itself came in what was known as chemical evolution: on early earth, there would have been plenty of molecules floating about, some more complex than others, constantly colliding and forming new molecules. At some point probably, by chance, a molecule appeared that could make a copy of itself (this would have been a precursor of DNA or RNA). As soon as this happened, evolution could start happening: by natural selection, the molecules that were better at making copies of themselves would survive, eventually leading to formation of more complex chains and bigger molecules.
      .
      Eventually, these would have, by chance, packaged themselves into a small lipid droplet and were therefore far more protected from the outside – this would have been the first primitive cell, from which more complex life evolved over billions of years!

Comments