Scientists have created a robot that can transform from a black glob into a swarm of tiny beads and back again.
The inventors say that the robot's ability to split itself into many pieces and then snap back together makes it potentially useful for drug delivery.
Unfortunately, their tiny scale comes at the cost of a reduced capacity to carry enough materials to meet the needs of treating entire diseased organs. In a recent study, a team of international scientists constructed a robot from 'ferrofluid', a suspension of iron oxide and hydrocarbon oil.
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