生物学家早就知晓,有一个昼夜时钟在生物体内调节着生理节律。但让人惊讶的是,一个研究小组最近证实,这个时钟并不因物种不同而有异,它普遍存在于所有生物体内。更甚者,它的指针从20亿多年前就开始“嘀嗒”走动了。生物钟,我们无法听到这个古老生物钟发出的声响,但它确实在我们的细胞中“嘀嗒”走动。说它古老,因为它的指针早在数十亿年前便开 Biologists have long known that a circadian clock regulates circadian rhythms in living organisms. Surprisingly, however, a team recently confirmed that the clock does not vary from species to species and that it is common in all organisms. What is more, its guidelines began to move “tick” from more than 2 billion years ago. The circadian clock, we can not hear the sound of this ancient circadian clock, but it does move “tick” in our cells. It is ancient because its guidelines opened billions of years ago