荷兰的安东尼·列文虎克是位勤奋的科学家,他曾在自制的显微镜下看到了人们从没见到过的生物界的秘密。他把认为不可能有任何生命存在的干燥沙土弄潮湿,不久他从显微镜下看到了其中极小的生物——轮虫的活动。他又把经阳光曝晒过的沙土用纸袋封起来,过了整整21个月,然后让沙土潮湿,使他惊奇的是:轮虫又出现了。于是他在1701年提出假说:“生命可以像钟表一样停下来,而潮湿便是钟摆。如果摇动它一下,生命的时钟便会重新开始走动。”其实,列文虎克这里所发现的就是生物在一定条件下的休眠现象。也许是受到列文虎克“生命像钟表”一说的启示,科学家现在常借用“生物钟”一词来研 Anthony Levin Hook, the Netherlands, is a diligent scientist who has seen, under a self-made microscope, the secrets of a living world he has never seen before. He moistened dry sand that he thought could not have any life, and shortly afterwards he saw the tiny creature - the rotifer - under a microscope. He sealed the sun-exposed sand in paper bags for another 21 months and then let the sand wet, so he was surprised that the rotifers had appeared again. So he made a hypothesis in 1701: “Life can stop like a watch, and the damp is the pendulum. If you shake it, the clock of life will begin to move afresh.” “In fact, what Levynko discovered here It is the dormancy of living things under certain conditions. Perhaps inspired by Levin Hurricanek ”Life Like Clocks“, scientists now often borrow the word ”biological clock" to study