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你造吗?地球生命可能也是外星人

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2015-04-03 08:45:05 转载来源: 网络整理/侵权必删

据国外媒体报道称,科学家已经提出一种假设,称地球上的生命构建模块或许是由撞击地球的陨石带来的。生命必然起源于一种遗传分子,比如DNA或者RNA,它们能够储存用于制造蛋白质的指令

据国外媒体报道称,科学家已经提出一种假设,称地球上的生命构建模块或许是由撞击地球的陨石带来的。

生命必然起源于一种遗传分子,比如DNA或者RNA,它们能够储存用于制造蛋白质的指令。但是细胞没有蛋白质就无法制造DNA,它们彼此依赖,但是科学家们一直无法分清究竟是谁先出现。

科学家们现在提出一种理论称,生命构成的所有必须化合物都出现于地球初期,而且或许来自于冰冷的陨石。陨石撞击到地球带来了各种分子,它们结合到一起从而在地球表面的水域中产生了生命。据《科学》杂志的报道称,地球在最初的数亿年里经常遭遇陨石撞击。

这项发表在《自然化学》杂志上的最新研究表明,非常简单的化学物质就能创造出生命构建模块。那些简单的化学物或许就是搭乘那些撞击地球的陨石到来的。包含在氰化氢在内的这些化学物质或许就是借着那些陨石散布在地球表面。

据研究生命起源的一位研究人员Dave Deamer声称,那些不同的生命构建模块或许是单独形成的,然后被冲刷到了同一片水域中。

标签: 你造 地球 生命 可能 也是 外星人


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