April 25, 1953: Watson & Crick publish DNA structure
2007 April 25
This unassuming one-page paper, published in Nature exactly 54 years ago, revolutionized the biological sciences.

Reference:
Watson, J. D. & Crick, F. H. C. (1953). A Structure for Deoxyribose Nucleic Acid. Nature 171: 737-738. [Full text]













