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The physicists tracked chloroplasts in the aquatic plant Elodea densa in different light conditions to build a model of their movement, and they soon recognized hallmarks of a glassy system in the data.

Elodea is a leafy, long-stemmed plant, known to crowd out native species of freshwater flora.

A state-led committee plans to poison the elodea previously found in Chena Slough with an herbicide as early as 2016, but the group is still gathering funding for the project.

Elodea was found in Lake Hood last month, causing officials to worry that departing aircraft could bring the weed to new sites.

Elodea is, however, uniquely susceptible to poisoning via introduction of a chemical called fluridone.