Story perspectives

Gravity-Bending Light Sensor Maps Subsurface Water, Magma, Tunnels

4/25/2026

Summary

Story summary

Enbang Li of the University of Wollongong built a one-meter device that bends light with Earth’s gravity.
It houses two fiber-optic coils that would total over 10 km unspooled and records picosecond laser-beam delays.
Detecting these delays lets the sensor sense subtle gravity shifts indicating underground water, magma or tunnels.
The light-based, moving-part-free design can run on submarines or aircraft and questions Einstein’s 1905 constant-speed claim.

1 of 1

Story summary

Enbang Li of the University of Wollongong built a one-meter device that bends light with Earth’s gravity.
It houses two fiber-optic coils that would total over 10 km unspooled and records picosecond laser-beam delays.
Detecting these delays lets the sensor sense subtle gravity shifts indicating underground water, magma or tunnels.
The light-based, moving-part-free design can run on submarines or aircraft and questions Einstein’s 1905 constant-speed claim.