1 of 7 — Donnell Brown and another cowboy move a grouping of bulls from one pen to another on rib-eye ultrasound day at the R.A Brown Ranch. 2 of 7 — Rancher Donnell Brown separates Angus ...

A suite of noninvasive, adaptive focusing techniques allow ultrasonic beams to be focused through the rib cage and skull. Ultrasound -- sound with frequencies higher than those audible to humans ...