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VIDEO: How Hair Ice Grows

In 2013, American Scientist featured an article on odd ice formations on plant stems, including these curling ribbons of ice. One of the types of ice discussed in the article was hair ice—long, thin strands of ice that grow under quite specific conditions. The only problem is that a new study shows the theory put forth at the time—that gas pressure pushes the water out—isn’t correct... (click the link above to read more).

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What can we learn about the brain by getting up close and personal into the sense of smell of the giant sphinx moth? More than you'd think.

Dr. John G. Hildebrand, a neuroscience professor at the University of Arizona and one of Sigma Xi's Distinguished Lecturers, studies insect nervous systems, particularly the neurobiology of the olfactory system, its roles in behavior, and related areas of chemical ecology and biology of disease vectors.

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