we'll find out if the way things are is the only way they can be and explore the consequence of a world were things are bigger.Call it a thought experiment if you like ,something scientists have always used to explore the workings of the universe.
Size doesn't matter,what matter is health and overcoming obstructions.
If we can't change the size of the planet how about changing the size of life on the planet?
Even with a four legged friend life as a giant would be no fairytale.It would have to be a very strange creature indeed to overcome all the problems that being big creates for a human being.That's because size is intrinsic to everything. Your size determines what shape you are, how you live,what you eat.Change it too much and you simply get a different species.
In astronomy we have a great privilege.we can do something that historians and archaeologists only dream of, we can directly take images of the distant past and we do this by looking at objects that are far away in the universe. Objects that are far away they have sent out the light that we receive billions of years later,and light travels with a limited speed(the speed of light)and therefore looking far out into space means also looking far back into time.
变大
3亿年前的昆虫尺寸巨大是因为氧含量高达31%，氧气 sink and react。（为什么没大型昆虫）
南瓜成长有时间限制而没有太强速度限制。
红杉高达，有三角形的应力结构、高低不同树叶特征（阔针叶）对应不同的用水量。
增大尺寸，生理机制会性变。骨骼占比增加、内热内压增加。反应变慢、心脏变大供血心脏、返回四足。食量大、骨骼易折断。
恒星变大，轨道变远，四季变长，植物难生长。恒星短命易爆炸。
变小
熔铁核变小，地磁会不稳定和多极化。近和潮汐锁定。
人类是大型哺乳动物（Zipf’s law），大个体还是大社会？身高和寿命。环境和身高。招致。（为什么最小的哺乳动物不能比最小的昆虫小？）血液和呼吸系统循环困难。食量和体重比，和皮肤内部容积比、热量燃烧/好散/保温速度。机制界限。分泌胶水和无分泌的分子间力。神经元大小不变，数量和认知力。
we'll find out if the way things are is the only way they can be and explore the consequence of a world were things are bigger.Call it a thought experiment if you like ,something scientists have always used to explore the workings of the universe.
Size doesn't matter,what matter is health and overcoming obstructions.
If we can't change the size of the planet how about changing the size of life on the planet?
Even with a four legged friend life as a giant would be no fairytale.It would have to be a very strange creature indeed to overcome all the problems that being big creates for a human being.That's because size is intrinsic to everything. Your size determines what shape you are, how you live,what you eat.Change it too much and you simply get a different species.
In astronomy we have a great privilege.we can do something that historians and archaeologists only dream of, we can directly take images of the distant past and we do this by looking at objects that are far away in the universe. Objects that are far away they have sent out the light that we receive billions of years later,and light travels with a limited speed(the speed of light)and therefore looking far out into space means also looking far back into time.
有趣严谨的思想实验是该片的骨架。
一、关于版本的选择
关于这部纪录片Size Matters，现在发现了两个版本，都是在B站上的
一个是纪录片之家2019年上传的《尺寸迷思》，https://www.bilibili.com/video/BV1t4411W7y5
这个版本是女声版；
一个是B站正版购入的《大小很重要》，https://www.bilibili.com/bangumi/media/md15816043
这个版本是男声版，有一个up主上传的也是这个版本，但只有英文字幕， https://www.bilibili.com/video/av202603481/
两个版本区别在于旁白朗读者一男一女，穿插在正片中的引导自然也有差异，但正片内容顺序还是一样的；
题目同样都是Size Matters，直译的话的确是“大小很重要”，但对于内容来说，“尺寸迷思”可能更显得“信达雅”。
最大的区别男声版直接把女声的朗读者给全部剪掉了，没有出现女性旁边朗读者，而她的戏份其实并不少，都用剪辑的视频给替代了，那这么看起来还是先有女声版，才有后来的男声剪辑版。个人推荐直接看女声版就够了。
这部纪录片一共两集，女声版第一集是 Big Trouble，第二集是That Shrinking Feeling
男声版是把标题改成了 Is Bigger Better？，Is Small Beautiful？
二、具体的一些想法
（1）女性朗读者开宗明义我们将进行一场思想实验（thought experiment），而这部纪录片的核心就是如此，不停地做着头脑风暴，并且用特效将这些想法一一试图还原出来。两集纪录片都有顺序地、主要从三个方面进行思想实验，即放大或缩小地球、人类自己和宇宙恒星或行星。
不得不说，旁白朗读者在这部纪录片中存在感比较高，穿插在大大小小的环节之中，然而在2018年的特效中，她的出场总是给人一种比较明显的抠图的感觉U•ェ•*U
（2）在观看这部纪录片之前，我其实就已经先下了一个判断，无论是宇宙还是地球，或者说生态圈、人体等等，“存在即合理”，世间万物以现在的形体存在那必然是经历过了大量的磨合，优胜劣汰后的产物。这绝对是一个极其精妙的系统，或许可以允许多少多少微小的精度偏差，但如果想发生变化那绝对是要经历多大成本的改变才能实现，至于什么是多大、什么是多小那就要在不同的环境下来判断。就比如说大气中氧气的浓度的改变，地球与月球之间的距离，都可以有变化，但是一旦超过那个度就会引起翻天覆地的变化。
接着看下去，的确是有很多思想实验佐证了我的看法，比如放大多少倍的地球或者缩小几分之几的地球，放大太阳与缩小太阳，放大人类与缩小人类，植物、动物、寿命、智力等等，很多不同的角度。也可以说，只要你肯放大或缩小这些东西，你就一定会改变它们，使得它们成为新物种，或者新的星系。一旦体型超过了合适的区间，那么生物必然会为了适应新的体型进化成或者退化成新的物种。至于我为什么说新的星系，那当然是放大的太阳或者缩小的太阳都会导致灾难性的后果（灾难当然是对人类来说）┗( ▔, ▔ )┛
（3）在长达近两个小时的思想实验中，你可能不会获得什么实在实在的知识，但你可能会记住人类最好别长太高，地球这么大就够了，太阳还好只有这么小(✪ω✪)
三、最喜欢的一段话
那就是开头的引语：
planets are big，insects are small，people are somewhere in-between
宇宙万物皆有其位
Everything has a place in the grand order
2021年8月29日11:08:21 看完
2021年8月31日14:43:10 写完