See the ‘periodic table’ of molecular knots
Fashioning these structures is a way for chemists to test their mettle
![illustrations of molecular knots](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2018/08/081418_EC_molecular-knot_feat.jpg?fit=860%2C460&ssl=1)
FIT TO BE TIED Researchers cataloged the possible types of molecular knots that can be made, including the already-synthesized trefoil knot (3-D illustration at left) and 10124 (right), which is yet to be created.
Mattia Marenda and C. Micheletti