> "The polar bear's sense of smell is so sensitive that it can smell a dead whale twenty miles away." To which our rejoinder, between gusts of laughter, was "WHO COULDN'T?"

I have smelt a 50-ton whale rotting on a Perth beach before and it certainly was potent from several hundred metres away ... I don't know if a human could smell it at 20 miles, but it doesn't surprise me that plenty of animals can!
Informative headline:

'Testimony to play crucial role in trial'