Australian scientists grow replica human lungs and call for end to animal testing

Exclusive: Everyone told me it would never work', says professor of nanomedicine, but science needs alternatives to experimenting on animals

Professor of nanomedicine Wojciech Chrzanowski finds it heartbreaking" to recall some of his early scientific work, where research involving animal testing was inevitable.

The moment you start working in a lab, and have to start squeezing and cutting animals, you feel sorry for them," Chrzanowski said.