Purdue professor shows drone that tracks people in forests without GPS

Purdue University computer science professor Aniket Bera has demonstrated an autonomous drone that follows a person through a forest, weaves around trees and predicts their movement when they vanish from view. Shown in a 44-second video, the drone navigates without GPS or a pre-made map, using onboard computing. It could aid search-and-rescue teams, though real-world effectiveness is unproven.