Because verses are improvised according to the needs of the moment, however, they often enable a rough estimate of their age by mentioning contemporary social or political conditions ( thus narrowing a version's possible time of origin to periods in which those conditions prevailed ) and / or referring to specific current or past events ( thus setting a maximum boundary for a version's age ).
22.
TWO SCIENTIST DID AN EXPERIMENT : they took a round bottom flask, put two electrodes in it, filled it half with water, and put some rare gasses in same proportion they thought would have been present at the time of origin . they kept this setup for weeks at 100degree Celsius . electrodes are used for sparking mimicking lightning . and after weeks lo and behold1 TYHEY found key compounds needed to let life exist.
