CAMBRIDGE, England, United Kingdom  (Reuters) — A small fly the size of a grain of rice could take the title of Top Gun of the insect world after Cambridge scientists identified its remarkable ability to detect and intercept its prey mid-air, changing direction mid-flight if necessary before sweeping around for the kill. The robber fly Holcocephala is relatively small  -  at 6 millimeters (mm) in length but can spot and catch prey more than half […]