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Those 'DNA knots' weren't knots at all, and the truth is stranger

For decades, biology textbooks taught that DNA’s story could be told with a single image: two elegant strands twisting in a ...
Gizmodo

Forget the Double Helix—Scientists Discovered a New DNA Structure Inside Human Cells

Guided by the work of Rosalind Franklin, James Watson and Francis Crick discovered the the twisted-ladder structure of DNA in 1953, a finding that gave rise to the modern field of molecular biology.