Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Origin of Life Origin of the Solar System • Earth is estimated to be ~4.6byo – Radiometric dating of rocks & meteors • Nebula: cloud of gas & dust in space • Nebula Hypothesis: – Gravity pulled much material together (Sun formed) – Planets: remaining materials Ancient Earth • Atmosphere contents: – Ammonia, H2O vapor, Methane, CO2 • Climate: – Extreme heat due to meteor impacts & volcanic activity • Eventually Cooling: Water vapor condensed (oceans formed) Click on picture to play video clip • Hypothesis: Energy from lightning created organic materials from inorganic ingredients • Experimental Set-Up: – Ammonia, H2O vapor, Methane, CO2 gases added – Electricity added (simulate lightning) • Result: Amino Acids & later nucleotides Murchison Meteorite Cell Formation? • Liposomes – Spheres of lipids – Can form around organic molecules – Hypothesis: 1st cell membranes?