The third great domain of life, the archaea, look, under a microscope, like bacteria.

第三大“域”是古菌域，在显微镜下察看时，古菌看起来像细菌。

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Or are there other biological domains hiding in the shadows—missed, like the archaea were for so long, because biologists have been using the wrong tools to look?

或者是否还有其他的生物“域”隐藏在某个神秘角落？ ——不为人所知，就好像古菌一样，因为生物学家误用观察工具所致，默默无闻多时。

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As to importance, when originally identified as distinct, the archaea, too, were regarded as marginal-yet their methane-generating properties are now a factor in climate-change calculations.

至于其重要性，古菌群在最开始被认定为自成一类时，也被视为无关紧要——但是它们释放甲烷的特性现在已被纳入气候变化的考察因素。

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As to importance, when originally identified as distinct, the archaea, too, were regarded as marginal yet their methane-generating properties are now a factor in climate-change calculations.

ECONOMIST: A new domain of life

The bug will be based on an archaea called pyrococcus furiosus, first discovered near the hot springs of Vulcano Island, Italy, but it will contain features of three to five other bugs.

FORBES

Mathur focused on detecting methane in the breath, since animal studies found that the presence of a certain family of organisms called archaea, which are older than bacteria and colonize the gut, was linked with weight gain and conveniently released small amounts of methane gas.

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