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Hey there welcome to life noggin.
大家好！欢迎来到脑洞大开的生命奇想！
You ever wonder how small we are in the universe? It turns out pretty small.
你有没有想过我们在宇宙中有多小?答案是非常小。
It would be hard to pick you out of a stadium of people much less the over seven billion humans that live on this planet.
从一个体育场中找到你是很困难的，更不用说从超过70亿人的星球上找到你了。
Since the average height for a person in the US is about one point sixty nine meters.
美国人的平均身高大约是1.69米，
Let's estimate and say that on their tippy toes and with their hands up in the air. The average person would be about two meters from their toes to their fingertips.
现在让我们假设人们以脚尖站立，同时把手举在空中，这样人的平均高度大概就有两米了。
That means it would take about 162 people all stretched out to be as tall as the Eiffel Tower which is 324 meters high.
这意味着，需要162个人全部伸展身体叠起来才能和324米的埃菲尔铁塔一样高。
With the diameter of our nearly spherical earth around twelve thousand seven hundred and fifty six kilometers.
接近球形的地球的直径大约是12756公里。
It would take nearly four thousand Eiffel Towers standing on top of each other to be as tall as the diameter of the earth.
将近4000个埃菲尔铁塔相互叠加起来才有地球直径那么长。
What's pretty cool is that we've actually had a good understanding of how small we are compared to the earth for quite a while.
很酷的一个事情是，很长一段时间以来我们都很清楚我们和地球相比有多小。
That's because back around two thousand years ago,
这是因为在大约两千年前，
the size of the earth was calculated pretty accurately by the geographer poet, mathematician and man of many titles known as Eratosthenes.
地球的大小是由地理学家、诗人、数学家和拥有其它许多头衔的埃拉托色尼非常精确地计算出来的。
Sources differ slightly but it seems like he was only off by one to seventeen percent of the actual value.
消息来源略有不同，但看起来他的计算误差只有1%到17%。
That's pretty impressive but that's just how small you are compared to the earth.
这是相当令人钦佩的。但这只是你与地球相比是多么的小。
You're even smaller if you compare yourself to the Sun and while we may think the Sun is a super big ball of fire,
如果和太阳相比你会更小，虽然我们可能认为太阳是一个超级大的火球，
it's actually kind of small compared to the other stars in the universe. There are stars a hundred times bigger.
太阳和宇宙中的其他恒星相比其实很小。甚至有比太阳还要大百倍的恒星。
Even the enormous blue star Icarus, the farthest star ever seen is way bigger, more massive
甚至迄今为止观察到的最远的恒星伊卡洛斯星都比太阳大得多，
and possibly hundreds of thousands of times intrinsically brighter than the Sun.
而且它本身的亮度可能是太阳的成千上万倍。
According to the NASA night sky Network, if we shrunk our Sun down to the size of a grain of sand,
根据美国宇航局探测到的星系网络，如果我们把太阳缩小到一粒沙子那么大，
our solar system would be small enough to fit in the palm of your hand on this scale.
那么我们的太阳系就会小到可以放到你的手掌中。
The Milky Way galaxy would be about as big as North America and that's just our galaxy.
银河系就会大概和北美一样大，然而这仅仅是我们的星系。
The Milky Way is just one of the billions of galaxies that make up our universe.
而银河系只是构成我们宇宙的数十亿星系之一。
That means you're a super small creature on a planet much bigger than you are,
这意味着你只是一个在比你大得多的星球上的超级小的生物，
traveling around in an even bigger solar system, in an even bigger galaxy which is one of the billions in the universe.
而地球则在一个更大的太阳系中漫游，而太阳系所在的银河系是宇宙中数十亿星系之一。
So yeah your tiny but hey at least you're not the size of one of your cells, your red blood cells.
是的你非常渺小，但是至少你没有你的一个红细胞那么小。
Some of these smallest and most abundant ones in your body only have a diameter of about seven or eight micrometers which are a thousand times smaller than a millimeter.
红细胞是你体内最小也是最多的细胞，它们当中有一些直径只有七、八微米，比一毫米小一千倍。
A typical ant is about ten millimeters long so your red blood cells are really really tiny but they're still super important to your health.
一般蚂蚁大约10毫米长，所以你的红细胞非常非常小，但是它们对你的健康仍然非常重要。
So next time you're feeling small just remember being a tiny drop in the universe doesn't stop you from doing awesome and important things.
所以下次当你觉得自己渺小的时候，请记住，虽然你只是宇宙中的一个小水滴，但这并不会阻止你去做一些了不起的重要的事情。
Huh that was a good motivational quote. I should put that on my Instagram.
哦，我应该把这句至理名言发布到我的Instagram上。
In the comment section below I want to learn something cool about you. Thanks for being here and thanks for watching!
在下面的评论区我想看到关于你的一些牛事，感谢你观看本视频！
Love life noggin, don't forget to subscribe and hit the bell button so you're notified every time we post a new video.
喜欢脑洞大开的生命奇想栏目的话，不要忘记点关注哦，还有记得点击推送提示按钮，这样我们每次更新你都会收到通知！
Curious to know what would cause planet earth to explode check out this video!
想知道什么会导致地球爆炸吗？请看看这个视频！
This asteroid was about nine kilometres in diameter and it hit the planet at about 64,000 km/h.
这颗小行星直径约9公里，以每小时6.4万公里的速度撞击地球。
Even with all that force it only carved out a chunk of Earth a few kilometers deep,
即使这个小行星冲击力这么大也只凿了地球几千米深。
As always my name is black oh this has been life noggin don't forget to keep on thinking.
我是宝高，这里是脑洞大开的生命奇想。思考不要停！
