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Explorers entering this dangerous cave must wear respirators and carry monitors. Poisonous gases rise to fatal levels so quickly that an early warning system is essential. Bats survive by staying close to the skylights, but venturing deep into the cave is very dangerous indeed. The source of these toxic fumes lies several miles below. Hydrogen sulfide gas bubbles up from oil deposits in the earth' s crust. It mixes with oxygen in the water, and forms sulfuric acid. These are not the sort of conditions in which you' d expect to find fish, yet these cave mollies seem to thrive despite the acid and the low levels of oxygen. There is, in fact, more life here than anyone would think possible, but the biggest surprise is something altogether more bizarre. |
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jìn rù zhè gè wēi xiǎn dòng xué de tàn xiǎn zhě bì xū dài shang hū xī qì hé jiān cè yí. yǒu dú qì tǐ hěn kuài huì shēng dào zhì mìng de shuǐ píng, suǒ yǐ zǎo qī yù jǐng xì tǒng bì bù kě shǎo. biān fú tōng guò jǐn tiē chū kǒu lái shēng cún, dàn shì jìn rù dào dòng xué lǐ miàn shì shí fēn wēi xiǎn de. zhèi xiē dú qì yuán wèi yú jǐ qiān mǐ de shēn chù. liú huà qīng qì tǐ bù duàn cóng yùn cáng zài dì qiào xià de shí yóu zhōng mào chū lái, tā yǔ shuǐ zhōng de yǎng qì huà hé xíng chéng liú suān. zài zhè yàng de huán jìng xià wǒ men tōng cháng rèn wéi bú huì yǒu yú cún zài, dàn shì zhè zhǒng dòng qī fān qí yú jiāng què shù liàng hěn duō, jǐn guǎn yǒu liú suān, ér qiě yǎng qì quē fá. shì shí shàng, zhè lǐ de shēng wù shù liàng bǐ rén men xiǎng xiàng de duō de duō, dàn zuì dà de yì wài hái zài yú yī zhǒng gèng qí yì de dōng xī. |