The giant African snail can reach a length of 33 centimetres (13 inches). It uses its tongue to scrape off bits of leaves to eat.
Naturally toxic
Naturally toxic Mercury is being released into the oceans by
hydrothermal vents which occur on ocean floors. Hydrothermal vents
are like hot springs or small volcanos which are situated on the
floors of oceans. Scientists are now wondering whether this natural
pollution may be contaminating fish. 9 OCTOBER 1999, P. 11
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