Wei Cai

Heat a crystal, and its atoms start to jiggle like plucked strings. An X-ray beam passing through the crystal scatters off these vibrations, painting on the detector not only sharp spots but also faint, smeared patterns. These patterns are like fingerprints: from them, you can reconstruct how strongly atoms pull and push on each other.

Geophysics has always sought a language to converse with the depths. Well drilling is a crude alphabet, laboratory core tests are slow decoding. A new approach turns humming porosity into a pure note.