Julian Gavaghan
Daily Mail
Like some epic computer-generated movie scene, futuristic aircraft swarm around in synchronised fashion and perform impressive mid-air stunts.
But the spectacle is real and the robotic nano quadrotors – despite being not much bigger than your hand – could one day revolutionise warfare.
The miniature helicopters, which have four propellers, are still in their infancy in development but have been extensively trialled in carrying items and manoeuvre through small gaps.
Cartoon by Bob Moran
