黑料导航

As seen in聽,听,听,听, and other outlets, research co-authored by Professor and Chair of Anatomy聽, provides new insight into how toothed whales and dolphins came to navigate the underwater world using sound waves (echolocation). The聽researchers analyzed a large set of fossils belonging to two species of ancient dolphins in the genus聽Xenorophus, which, like living echolocating dolphins and whales, had asymmetrical skulls. However, the fossils suggest that the animals were less adept than their living relatives at producing high-pitched sounds or hearing high frequencies. Given this, as well as other factors, Geisler and his co-author conclude that聽Xenorophus聽marked a key transition in how whales and dolphins developed their 鈥渂uilt-in sonar.鈥�