James Watson and Francis Crick's Experiments (1 ene 1951 año – 31 dic 1953 año)
Descripción:
 twisted ladder. James Watson and Francis Crick solved the structure of DNA. Other scientists, like Rosalind Franklin and Maurice Wilkins, also contributed to this discovery.
Watson and Crick discover chemical structure of DNA. Crick announce that they have determined the double-helix structure of DNA, the molecule containing human genes. Though DNA–short for deoxyribonucleic acid–was discovered in 1869, its crucial role in determining genetic inheritance wasn't demonstrated until 1943 
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fecha:
1 ene 1951 año
31 dic 1953 año
 ~ 3 years