Here are two items that relate to David Hu's previous Georgia Tech research on the ability of fire ants to form rafts made of, well, fire ants in order to stay afloat and alive during floods. Hu, an adjunct professor in the Schools of Biological Sciences and Physics, who is also a professor in the George W. Woodruff School of Mechanical Engineering, took closeup photographs of the fire ants in his lab experiments with graduate student Nathan J. Mlot. Meanwhile, in the Overhead at the National Geographic podcast, photographer Anand Varma describes shooting Hu's fire ants during a separate visit to Georgia Tech. (National Geographic photos require registration.)