)
Australian scientist speaks to frogs, fears their silence
70-year-old biology professor and conservationist at the University of Newcastle in Australia's New South Wales has mastered imitating and understanding the numerous shrills, croaks and whistles of frogs to locate them in the wild. And he gets a thrill every time they call back.
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)