Tiny robots activated by magnetic fields may be used in future biomedical procedures. Start listening to Audible with a 30-day trial and your first audiobook, plus two Audible Originals free when you go to http://audible.com/veritasium or text veritasium to 500500 Huge thanks to: Dr. Eric Diller, Assistant Professor of Mechanical Engineering at the University of Toronto http://microrobotics.mie.utoronto.ca Research Referenced in this video: T. Xu, J. Zhang, M. Salehizadeh, O. Onaizah and E. Diller, Millimeter-scale flexible robots with programmable three-dimensional magnetization and motions. Science Robotics. 4, eaav4494 (2019). http://robotics.sciencemag.org/lookup/doi/10.1126/scirobotics.aav4494 H. Xie, M. Sun, X. Fan, Z. Lin, W. Chen, L. Wang, L. Dong, and Q. He, Reconfigurable magnetic microrobot swarm: Multimode transformation, locomotion, and manipulation. Science Robotics. 4, eaav8006 (2019). http://robotics.sciencemag.org/lookup/doi/10.1126/scirobotics.aav8006 G. Hwang, A. J. Paula, E. E. Hunter, Y. Liu, A. Babeer, B. Karabucak, K Stebe, V. Kumar, E. Steager, and H. Koo, Catalytic antimicrobial robots for biofilm eradication. Science Robotics. 4, eeaw2388 (2019). http://robotics.sciencemag.org/lookup/doi/10.1126/scirobotics.aaw2388 Special thanks to Patreon supporters: Donal Botkin, Michael Krugman, Ron Neal, Stan Presolski, Terrance Shepherd, Penward Rhyme Music by Kevin MacLeod http://incompetech.com "Marty Gots a Plan" "March of the Spoons"