From stiff to soft in a snap: Magnetic jamming opens new frontiers for microrobotics

Could tiny magnetic objects, that rapidly clump together and instantly fall apart again, one day perform delicate procedures inside the human body? A new study from researchers at the Max Planck Institute for Intelligent Systems in Stuttgart and at ETH Zurich introduces a wireless method to stiffen and relax small structures using magnetic fields, without wires, pumps, or physical contact.