研究人员写道,这些色素在众多生物有机体中的出现,暗示它们可能在很早的时候就在生命之树众多分支所共有的祖先体内完成了进化。施维特曼说,甚至有一些证据表明,被称为“嗜盐菌”的现代紫色喜盐微生物可能与地球上某些最早的生命形式有关,这些生命曾经在海洋中的甲烷喷口附近旺盛生长。
紫色的外星人
Regardless of whether the first life on Earth was purple, it's clear that lavender life suits some organisms just fine, Schwieterman and DasSarma argue in their new paper. That means that alien life could be using the same strategy. And if alien life is using retinal pigments to capture energy, astrobiologists will find them only by looking for particular light signatures, they wrote.
施维特曼和达斯萨尔马在他们的新论文中指出,不管地球上最早的生命是否呈紫色,显然薰衣草色的生命十分适合某些有机体。这意味着外星生命可能在使用同样的方式。他们写道,如果外星生命正在利用视黄醛色素捕获能量,那么天体生物学家将只有通过寻找特定的光线标记才能找到它们。
Chlorophyll, Schwieterman said, absorbs mostly red and blue light. But the spectrum reflected from a plant-covered planet displays what astrobiologists call a "vegetation red edge." This "red edge" is a sudden change in the reflection of light at the near-infrared part of the spectrum, where plants suddenly stop absorbing red wavelengths and start reflecting them away.
【地球上最早的生命和外星生命可能都是紫色的】相关文章:
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