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Less than a week after beginning his work on nucleic acids, Pauling believed he had found the complete molecular structure.

In the history of science, "Page 20" refers to a specific entry in the narrative of race to discover the structure of DNA. Page20

Pauling's model lacked space for sodium ions in its tightly packed core, a mistake that ultimately allowed Watson and Crick to win the race. 20. Pauling's Mad Rush - Linus Pauling and the Race for DNA Less than a week after beginning his work

Detailed on this page of the historical narrative is the moment Pauling's assistant, Robert Corey, found that the proposed atomic positions did not fit. Page20