Video: Environment

Parasite study reveals nocturnal secrets of snails (1:44) 

Aug. 23 - Research into how snails spread a parasite fatal to dogs has revealed that the gastropods can explore the length of an average British garden in a single night - reaching a top speed of one metre per hour. The revelations came after scientists fitted a sample group of snails with LEDs and filmed them with high-speed cameras. Matthew Stock has more. ( Transcript )

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