GROOVES 3 (IMAGE) Rice University Caption White arrows (left) highlight large "macrogrooves" in an optical microscope image of a commercially available filter membrane. Zooming in with an atomic force microscope (center and right) reveals smaller microgrooves. The center image shows the area within the white box in the left image, and the right image shows the area within the white box of the center image. Credit Kono Group/Rice University Usage Restrictions None 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.