Semicircular Canals in Baboon Skull (IMAGE) Penn State Caption A computer reconstruction of an adult female baboon skull from high-resolution X-ray computed tomography (CT) slices. The skull is rendered transparent to show the position of the three semicircular canals and cochlea of left inner ear filled in red. The enlargement of the canals and cochlea is five times the size of the canals shown in the skull. Each canal is approximately 5 mm in diameter. Credit Alan Walker lab, Penn State Usage Restrictions Not for publication in any public medium until after the embargo lilfts at 5 p.m. U.S. Eastern time on June 18, 2007. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.