As if the swamped residents of the Texas Gulf Coast don't have enough reasons to curse Hurricane Harvey, here's one more: clumps of stinging fire ants bobbing in the floodwaters. The New York Times story and this one in the Washington Post cite a 2011 study by School of Biological Sciences Associate Professor David Hu that explained the fire ant's raft-building superpower. Hu is also an associate professor in the George W. Woodruff School of Mechanical Engineering and an adjunct associate professor in the School of Physics.