Well, the answer depends on what we mean by the “origin of life”. One could say that it all started 13.8 billion years ago with the birth of the universe – the “shock and awe” process we call the Big Bang. The impetus that kick-started the processes which led to primitive life-forms may have come from the seeding of our planet with molecules such as amino acids on asteroids, comets, stardust, or other cosmic bodies crashing into our young planet. Perhaps, the jolt to bring inanimate abiotic molecules together to form the precursors to biological molecules could have come from lighting strikes. This process of prebiotic synthesis was first experimentally tested back in 1952 by a graduate student Stanley Miller.
The now famous Miller-Urey experiment was an impressive attempt to show that it was possible to synthesis life’s building blocks by simulating conditions of the early Earth. With nothing more than hydrogen, water, methane and ammonia, Miller was able prepare a concoction of amino acids – the building blocks of everything alive on Earth. Continue reading “Did life originate with a bang?”