Concerns about drones, how to hunt exoplanets and more reader feedback

Send in the drones

Researchers are taking cues from bats, moths and swallows to develop fancy flight maneuvers for drones. In “High fliers” (SN: 2/7/15, p. 18), Nsikan Akpan described future unmanned vehicles that, like nature’s best aerial acrobats, may dodge obstacles, navigate turbulent winds and land precisely on perches.