Original: The now-famous "Millerâ" Urey experiment "used a highly reduced mixture of gasesâ" methane, ammonia and hydrogenâ "to form basic organic monomers, such as amino acids.
Simplified: The now-famous Millerâ "Urey experiment used a highly reduced mixture of gases â" methane, ammonia and hydrogen â "to form basic organic monomers, such as amino acids.