The largest swarm of robots in the world lives on a table in a lab at Harvard University.
Each about the size of a sushi roll, with three spindly legs, the robots are all loaded with the same programme and given a simple black-and-white picture.
When all 1,000 are given the 'go' signal, individual robots shuffle slowly around the edge of the swarm, communicating via blinking infra-red lights.
Once they're in an acceptable position inside the required shape, they stop.
Tested on three different shapes, the robots took up to 12 hours to form each one.
But their record-breaking display of teamwork, inspired by insect behaviour, is a step towards more ambitious robotic swarms, which could sweep disaster sites or clean up polluted environments.
SHOW ALL | HIDE ALL
a large group (usuaully of insects) which moves together
long, thin and delicate
(here) to move around slowly and without much energy
flashing on and off
the ability to work together as a team
(here) to move quickly across an area, searching for things