The drones that announced Joe Biden as the 46th president-elect

You've seen them over sporting events, music festivals and political rallies; aerial drone displays have lit up night skies since the technology's 2012 debut at Ars Electronica Futurelab. No longer a niche entertainment spectacle, these light shows can feature massive swarms that are often presented right alongside traditional fireworks displays. And as small drone technologies continue to advance, these swarms are sure to grow. Drone swarm technology, in varying applications, has been pursued for years by government agencies like DARPA, where it's being investigated for military stuff, as well as private research institutions, such as University of Colorado Boulder where it's being explored as a search and rescue tool. Getting robots to not only sense the others around them but to actively work in concert, in pursuit of a common goal, enables the group to accomplish tasks that no individual could do on their own.