1) Scientists thought about the change and the origin of life. They had inorganic molecules and complex biomolecules and generated simple organic compounds. It also enlightened them to see that life on earth can come from simple cells.
2) Scientists have thoughts that life on different planets may exist or may possibly happen. They used methane, hydrogen, water, ammonia to get results and prove that there might be life on different planets.
hope this helps
~Hailey lee~