Comparable to some other animals on our planet, bats use other methods instead sight in order to navigate or hunt. They are able to “see” in the dark by sending out sound waves that bounce back to the bats’ ears from objects such as fruit on trees and flying insect prey. The echolocation or biosonar ... »

A team of researchers at the University of Illinois has created the world’s first acoustic “superlens”. It is an innovation that could have practical implications for high-resolution ultrasound imaging, non-destructive structural testing of buildings and bridges, and novel underwater stealth technology. According to the results, the acoustic system is analogous to an inductor-capacitor circuit. The ... »