Matthew Moore / KUAF

A box fan, some duct tape, and a few air filters can get you a homemade and high quality air purifier. Hugh Churchill, an associate professor at the University of Arkansas teamed up with Arkansas Research Alliance Academy to create Clean AR Air, where people can buy or donate these kits.

Ryan J. Foley, with the University of California Santa Cruz, will speak tomorrow night at Gifflels Auditorium in Old Main on the University of Arkansas campus. His talk is part of the Robert D. Maurer Lecture Series, which is sponsored by the U of A Department of Physics. We asked him about his team's recent important discovery regarding a counterpoint to gravitational waves and other matters dealing with our universe.