Echolocation could give small robots the ability to find lost people

Scientists and roboticists have long looked at nature for inspiration to develop new features for machines. In this case, researchers from the University of Toronto were inspired by bats and other animals that rely on echolocation to design a method that would give small robots that ability to navigate themselves — one that doesn't need expensive hardware or components too large or too heavy for tiny machines. In fact, according to PopSci, the team only used the integrated audio hardware of an interactive puck robot and built an audio extension deck using cheap mic and speakers for a tiny flying drone that can fit in the palm of your hand.