1953 picture of Francis Crick (L) and James Watson (R) walking along the backs of King's College in Cambridge.
James Watson and Francis Crick, Cambridge University, 1953
Image depicting DNA helix model and table.
15492. Discovering the double helix structure of DNA, James Watson, video with 3D animation and narration
James Watson used cardboard cutouts representing the shapes of the DNA bases to figure out how bases pair.
Animation of 2D DNA model becoming three dimensional.
Arthur Kornberg talks about Watson and Crick's Nature paper.
DNA as a double helix.
Linus Pauling's triple-helix model for DNA and the reaction to this incorrect model.
The DNA molecule is shaped like a twisted ladder.
Figuring out the base pairing.