Psychedelic Fiber Offers a New Twist on the Science of Knots 

A stretchy plastic that changes colors as it deforms lets mathematicians and physicists model the stress points of knots, and test which is the strongest. 

Psychedelic Fiber Offers a New Twist on the Science of Knots 
A stretchy plastic that changes colors as it deforms lets mathematicians and physicists model the stress points of knots, and test which is the strongest. 
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