Levitating sensor for magnetic fields could detect ultrafaint brain activity0

• SCIENCE, Science / Health, Science Mission Directorate, scientists, Space, Space Communications & Navigation Program, Space Launch System (SLS), Space Telescope, space-x-ipo, SpaceX
• August 7, 2026

A laser beam tracks the motions of the tiny magnet suspended in a vacuum chamber as it wobbles in response to magnetic fields.Credit: Wei Ji, Peking University Scientists have turned a levitating magnet into a device for measuring magnetic fields, known as a magnetometer — one that is sensitive enough to detect the faint signals