Nature has always served as a source of inspiration for scientists and roboticists seeking to create new characteristics for machines. In this example, the University of Toronto researchers were inspired by bats and other creatures that use echolocation to develop a mechanism that would allow small robots to navigate themselves — one that does not need costly gear or components that are too bulky or heavy for tiny machines. According to PopSci, the team merely utilised the inbuilt audio hardware of an interactive puck robot and developed an audio extension deck out of a cheap microphone and speakers for a little flying drone that fits in the palm of your hand.
