In which year James D. Watson and Francis Crick published their first paper on the double-helix model of DNA?

Explanation

To answer the question regarding the year James D. Watson and Francis Crick published their first paper on the double-helix model of DNA, we can follow these steps:

1. **Identify the Key Figures**: Recognize that the question involves two prominent scientists, James D. Watson and Francis Crick, who are known for their work on DNA.

2. **Recall the Major Contribution**: Understand that Watson and Crick are credited with proposing the double-helix structure of DNA, which is a significant milestone in the field of molecular biology.

3. **Locate the Publication Year**: The specific year when they published their first paper on this model is crucial. Their groundbreaking paper was published in the journal "Nature".

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