Thursday, 26 August 2010

subterranean travel and places,tabasco state,mexico

cueva del azufre,near tapijulapa is the only known place where the cave molly fish has been found.
Every year the zoque tribe preform a ritual in which a mashed root of the barbasco plant,an anaesthetic used to stun the  cave molly fish to ask their gods for rain.
Scientists have found that fish  in water  exposed to this toxin were more  able to cope with this toxin than in fish whose water hasn't been exposed to this toxin.
The cave has hydrogen sulfide.
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Villa luz cave,carved out of cretaceous limestone,is a poisonous cave,because of the hydrogen sulphide which leaks into the cave from oil deposits in the Earth's crust.
The hydrogen sulphide is used by bacteria who made sulphuric acid from it.
Full face respiraters must be worn, because of the lethal gases.
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