Contact: Jonathan Sherwood
jonathan.sherwood@rochester.edu
585-273-4726
University of Rochester

John Tarduno, University of Rochester

Caption: Geophysicist John Tarduno of the University of Rochester and the "SQUID" -- a Superconducting Quantum Interference Device -- that allows him to detect the strength of the ancient Earth's magnetic field.

Credit: University of Rochester

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Related news release: 3.2 billion-year-old surprise: Earth had strong magnetic field