Picture of the month
![](http://upload.wikimedia.org/wikipedia/commons/thumb/1/12/Knot_table.svg/360px-Knot_table.svg.png)
Credit: Jkasd
A chart of all prime knots with seven or fewer crossings, not including mirror-images. The knots are labeled with Alexander-Briggs notation. Originally studied to create a list of possible real-world knots, knot theory has become quite theoretical in nature and, at the same time, has been applied to concrete problems in organic chemistry, including the behavior of DNA.
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