Those scenes of floating fire ant "rafts" plaguing flooding victims of Hurricane Harvey in Houston? David Hu, associate professor in the School of Biological Sciences and the George W. Woodruff School of Mechanical Engineering, first examined that nightmare scenario in 2011. That was when Hu and his research team published a study on how ants lock legs to form the rafts. You also may recall his research from earlier this summer on how the ants don't just spread out when threatened; they can also "perpetually rebuild" towers made of their own bodies. Hu is also an adjunct associate professor in the School of Physics.