WELLINGTON: Giant freshwater crayfish, up to 25cm long, once roamed New Zealand's ancient lakes around ... where freshwater crayfish lived in prehistoric times. That will tell us much more about ...

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WELLINGTON, April 18 (Xinhua) -- Giant freshwater crayfish, up to 25cm long, once roamed New Zealand's ancient lakes ... where freshwater crayfish lived in prehistoric times.

He spoke about his encounters with the alpine plants on his recent speaking tour of South Island, New Zealand. This was a seven-week adventure which, he emphasised, was completed in perfect weather.