Interactive transcript · 199 lines
Good morning, science enthusiasts.
早上好，科学爱好者们。
Welcome to TalkCast, your go -to morning podcast for the most exciting and mind -expanding news from
欢迎收听 TalkCast，这是您获取最令人兴奋和开拓思维的新闻的首选早间播客，
around the globe and outer space.
新闻涵盖全球和外太空。
I am Daniel.
我是丹尼尔。
And I am Amelia.
我是阿米莉亚。
Good morning, everyone.
大家早上好。
Today is September 9th, 2026.
今天是2026年9月9日。
We are absolutely thrilled to have you start your morning with us.
能与大家一起开启新的一天，我们感到无比兴奋。
First, we want to express our deepest gratitude to all our TalkCast members.
首先，我们要向所有 TalkCast 会员致以最深切的感谢。
Your incredible support makes this show possible every day, allowing us to research and share these
您那难以置信的支持让这个节目每天得以呈现，让我们能够研究和分享这些
wonderful scientific discoveries.
精彩的科学发现。
Yes, thank you so much.
是的，非常感谢你们。
We love reading your comments and learning with you.
我们喜欢阅读大家的评论，并与大家共同学习。
If you are not a member yet, please consider joining our TalkCast membership.
如果您还不是会员，请考虑加入我们的 TalkCast 会员。
We need your support to keep bringing you these daily deep dives into the world of science.
我们需要您的支持，以便继续为您带来对科学世界的每日深度探索。
Now, let us take a quick look at what is making headlines this morning.
现在，让我们快速浏览一下今天早上的头条新闻。
We are starting with a mind -boggling cosmic simulation.
我们首先带来的是一个令人难以置信的宇宙模拟。
Scientists suggest our moon might have formed not over years, but in just five hours.
科学家表明，我们的月球可能不是历经多年形成，而是在短短五个小时内完成的。
Then we are traveling to the frozen continent of Antarctica, which surprisingly gained a record
接着我们将前往冰封的南极大陆，令人惊奇的是，那里增长了创纪录的
-breaking amount of ice.
突破纪录的冰量。
We will explain the unusual climate engine behind this phenomenon.
我们将解释这一现象背后的不寻常气候引擎。
After that, we'll look at NASA's sleek experimental aircraft, the X -59, which is gearing up to fly
之后，我们将关注 NASA 流线型的实验飞机 X-59，它正准备进行飞行
faster than sound without making a window -rattling boom.
比声音更快，且不会发出震耳欲聋的巨响。
And in our briefs, we've got fascinating stories on 15 ,000 -year -old art found in Irish caves, why
而在我们的简讯中，我们有关于爱尔兰洞穴中发现的1.5万年前艺术品的迷人故事，关于
our heel -first walking style helped us conquer the globe, and a tiny space rock that gave planetary
为什么我们脚后跟先着地的行走方式帮助我们征服了地球，以及一块微小的太空岩石给行星
defense systems a successful real -world test.
防御系统带来了一次成功的真实世界测试。
It's an incredibly packed lineup, so let us jump right into our top story.
今天的阵容非常丰富，所以让我们直接进入头条新闻。
Our lead story today takes us back billions of years to the creation of our closest cosmic neighbor,
我们今天的头条新闻将带 我们回到数十亿年前，探索我们最近的宇宙邻居的诞生，
the moon.
即月球。
For decades, the standard theory has been that a Mars -sized planet named Fia crashed into the early
几十年来，标准理论一直是：一颗名为“忒伊亚”的火星大小的行星撞击了早期的
Earth, creating a massive ring of debris that slowly clumped together over decades or centuries to
地球，产生了一个由残骸构成的巨大环带，这些残骸在几十年或几个世纪中慢慢 聚集在一起，
form the moon.
来形成月球。
Right, I remember learning that in school.
对，我记得在学校学过这个。
It's like a giant cosmic puzzle that slowly assembled itself over a very long time.
这就像一个巨大的宇宙拼图，在漫长的时间里慢慢拼合在一起。
Exactly, but new supercomputer simulations have completely challenged that timeline.
确实如此，但新的超级计算机模拟彻底挑战了那个时间线。
Researchers at the Southwest Research Institute decided to run simulations with a new factor,
西南研究所的研究人员决定引入一个新的因素来运行模拟，
temperature -dependent rock strength.
即与温度相关的岩石强度。
When they simulated the collision using this highly detailed physics model, they found that the moon
当他们使用这个高度详尽的物理模型模拟碰撞时，他们发现月球
could have formed in just five hours.
可能在短短五个小时内就形成了。
Five hours?
五个小时？
Are you joking, Daniel?
你在开玩笑吗，丹尼尔？
That's faster than my average flight.
那比我平时坐飞机的时间还要快。
How can a whole celestial body form in a single afternoon?
一个完整的天体怎么可能在一个下午的时间内形成？
It sounds unbelievable, but the simulation shows that instead of creating a scattered ring of dust
这听起来不可思议，但模拟显示，与其说是形成了一个分散的尘埃和
and rocks, the impact immediately launched a massive, intact chunk of molten Earth and Fia straight
岩石环，撞击反而立即将一块巨大且完整的熔融状态的地球和“忒伊亚”碎块直接发射到了
into orbit.
进入轨道。
This giant blob of material quickly separated from the Earth, smoothed itself out into a sphere
这个巨大的物质团迅速与地球分离，并在自身重力作用下自我平滑成一个球体
under its own gravity, and became the moon, all within a matter of hours.
在自身的重力作用下，变成了月球，这一切都在短短数小时内发生。
That is absolutely wild.
这简直太疯狂了。
So instead of a slow gathering of dust, it was more like a giant cosmic splash that immediately
所以，与其说是尘埃的漫长聚集，不如说它更像是一次巨大的宇宙溅射，它立即
pinched off a piece of planet.
捏下了一块行星碎片。
It's like dropping a heavy stone into a bucket of thick paint and watching a single giant droplet
这就像把一块重石头掉进一桶黏稠的油漆里，看着一个巨大的水滴
shoot up and freeze in midair.
向上飞溅并冻结在半空中。
That is a perfect metaphor, Amelia.
这是一个完美的比喻，阿米莉亚。
And what makes this new theory so appealing to scientists is that it solves a major chemical mystery.
而这个新理论之所以对科学家如此有吸引力，是因为它解开了一个重大的化学之谜。
For a long time, researchers have noticed that lunar rocks have almost the exact same chemical
长期以来，研究人员注意到月球岩石的化学成分几乎完全相同
composition as Earth's mantle.
与地球的地幔相同。
Under the old slow clumping theory, the moon should have been made mostly of material from the
在旧的缓慢聚集理论下，月球大部分应该由以下物质构成
impactor planet, Fia.
撞击行星“忒伊亚”。
But with this rapid, clean splash model, the moon naturally inherits a huge portion of Earth's outer
但是通过这种快速、干净的飞溅模型，月球自然地继承了地球外层的大部分
layers, matching what we actually find in lunar soil samples.
结构，这与我们在月球土壤样品中实际发现的相符。
Wow, science is always correcting itself when better technology arrives.
哇，当更好的技术出现时，科学总是在自我纠正。
I love how a supercomputer can turn a century -long process into a five -hour splash.
我喜欢超级计算机如何将长达一个世纪的过程变成五小时的飞溅过程。
It is truly amazing.
这真的很神奇。
Now let us bring our focus back to Earth, specifically to the Southern Polar Ice Sheet.
现在让我们将注意力转回到地球，特别是南极冰盖。
Scientists have recently announced that Antarctica gained a record -breaking 695 billion tons of ice
科学家们最近宣布，南极洲的冰量在两年内创纪录地增加了6950亿吨
over a two -year period.
在两年期间。
Wait, hold on.
等一下。
695 billion tons of ice?
6950亿吨冰？
That sounds like fantastic news.
这听起来是个极好的消息。
But I thought global warming was causing polar ice to melt rapidly.
但我以为全球变暖正导致极地冰川迅速融化。
Is Antarctica actually growing?
南极洲实际上在增长吗？
It's a fascinating paradox.
这是一个引人入胜的悖论。
While long -term warming is definitely still melting coastal glaciers, this sudden massive ice gain
虽然长期变暖肯定仍在融化沿海冰川，但这种突然的大规模冰量增加
was caused by an atmospheric event known as a Rossby Wave Train.
是由一种被称为罗斯比波列的大气现象引起的。
Whoa, back up a second.
哇，稍等一下。
A Rossby Wave Train?
罗斯比波列？
Is that a frozen polar railway or something?
那是极地冰冻铁路什么的吗？
Not quite.
不完全是。
Think of the Earth's atmosphere as a giant fluid ocean.
把地球的大气层想象成一片巨大的流体海洋。
High up in the sky we have fast -moving rivers of air, which we call the jet stream.
在高空中，我们有快速移动的气流，我们称之为急流。
Sometimes these rivers of air start to bend and wiggle, creating giant slow -moving loops.
有时这些气流开始弯曲和扭动，形成巨大的慢速移动环路。
These loops are called Rossby waves.
这些环路被称为罗斯比波。
When several of these loops line up in a row across the ocean, scientists call it a wave train.
当这些环路在海洋上排成一行时，科学家们称之为波列。
Ah, so it is like a giant invisible snake of wind waving across the globe. Exactly.
啊，所以它就像一条跨越地球挥舞的巨大隐形风蛇。确实如此。
In this case, the warming global climate actually created more evaporation, putting a lot of
在这种情况下，全球气候变暖实际上造成了更多的蒸发，产生了大量的
moisture into the air.
水分进入空气中。
This specific Rossby Wave Train acted like a giant funnel, grabbing all that warm, moist air and
这个特殊的罗斯比波列就像一个巨大的漏斗，吸收了所有温暖潮湿的空气，并且
dumping it directly over the coldest parts of Antarctica as heavy, unprecedented snowfall.
直接将其作为沉重的、史无前例的降雪倾倒在南极洲最寒冷的地区。
That snow quickly compacted into hundreds of billions of tons of fresh ice.
那些积雪迅速压实成数百亿吨的新冰。
I see.
我明白了。
So global warming actually provided the extra moisture, and the atmospheric waves acted like a
所以全球变暖实际上提供了额外的水分，而大气波的作用就像一个
delivery truck to drop it off as snow.
运输卡车将其作为雪降下。
It shows how incredibly complex and interconnected our global climate systems really are.
这表明我们全球的气候系统实际上是多么难以置信地复杂和相互联系。
It certainly does.
它当然是的。
It is a reminder that weather and climate are never simple one -way streets.
这是一个提醒，天气和气候绝不是简单的单行道。
So from cold winds in Antarctica, let us look at some extremely fast winds.
因此，从南极洲的冷风，让我们来看看一些极其快速的风。
I hear NASA is getting ready to test a very special plane? Yes.
我听说美国国家航空航天局正准备测试一架非常特殊的飞机？是的。
NASA is preparing its quiet supersonic jet, the X -59, for a highly anticipated noise test later this
美国国家航空航天局正在为其静音超音速喷气机 X-59 准备今年晚些时候高度受期待的噪音测试
year, following the successful completion of its 25th test flight.
此前它已成功完成了第25次试飞。
This experimental aircraft is designed to tackle a major barrier in aviation history.
这款实验性飞机的设计旨在克服航空史上的一个重大障碍。
Supersonic flight means flying faster than the speed of sound, right?
超音速飞行意味着飞行速度快于音速，对吧？
Why do we need a quiet version?
为什么我们需要一个安静的版本？
Why is supersonic flight currently banned over land?
为什么超音速飞行目前在陆地上空被禁止？
Well, when a normal aircraft flies faster than the speed of sound, it pushes air molecules out of
嗯，当普通飞机飞得比音速还快时，它会推开空气分子
the way with incredible force, creating a massive shockwave.
以不可思议的力量，产生巨大的冲击波。
On the ground, this shockwave is heard as a sonic boom.
在地面上，这种冲击波听起来就像是声波爆轰。
It sounds like a sudden massive explosion or a heavy thunderclap.
它听起来像是一场突然的巨响爆炸或一声沉重的雷霆。
It can literally shatter windows, scare animals, and shake buildings.
它简直可以震碎窗户、惊吓动物并摇晃建筑物。
Because of this, supersonic commercial flights have been banned over land in the United States and
正因如此，超音速商业航班在美国和
many other countries since 1973.
自1973年以来的许多其他国家都被禁止在陆地上空飞行。
Ah, that explains why the famous Concorde jet could only fly supersonic over the Atlantic Ocean.
啊，这解释了为什么著名的协和式客机只能在大西洋上空进行超音速飞行。
No one wants a mini explosion rattling their roof every time a plane passes by. Precisely.
没有人希望每次飞机经过时都有微型爆炸震动他们的屋顶。确实如此。
But the X -59 is designed to change all that.
但 X-59 的设计旨在改变这一切。
Its unique, super -elongated nose and specially swept wings prevent the shockwaves from merging into
它独特而超长的机头和特制的后掠翼可以防止冲击波融合成
a single loud boom.
单一的巨大轰鸣声。
Instead, they spread the shockwaves out.
相反，它们将冲击波分散开来。
When the plane flies supersonic, it only produces a soft, sonic thump on the ground, which is about
当飞机超音速飞行时，它在地面上只会产生微弱的音爆声，大约
the same volume as a car door closing down the street.
相当于街上关车门一样的音量。
That is incredible.
那真是难以置信。
A sonic thump instead of a sonic boom.
是低沉的重击声，而不是剧烈的音爆。
It's like replacing a loud drum strike with a gentle tap.
这就像是用轻柔的拍击取代了剧烈的击鼓。
If these noise tests succeed, we might finally see the return of supersonic passenger flights over
如果这些噪音测试取得成功，我们最终可能会看到陆地上空超音速客机的回归
land, cutting travel times in half.
将出行时间缩短一半。
That is exactly the goal.
这正是目标。
NASA plans to fly the X -59 over several cities to ask residents what they actually hear, proving to
美国国家航空航天局计划让 X-59 飞越几个城市，询问居民他们实际听到了什么，以此向
regulators that supersonic travel can be quiet and practical.
监管机构证明超音速旅行可以是安静且实用的。
I would love to cross the country in two hours without causing a neighborhood panic.
我很想在两小时内穿越全国，而不会引起社区的恐慌。
Sign me up for that flight.
请帮我报名乘坐那趟航班。
We might not have to wait too long.
我们可能不需要等待太久。
Now, let us transition to our daily quick -fire news roundup, starting with an amazing archaeological
现在，让我们过渡到每日快讯，首先是一项了不起的考古
discovery in Europe.
在欧洲的发现。
Archaeologists using advanced algorithm -guided surveys have discovered ancient cave art in southwest Ireland.
考古学家利用先进的算法引导调查，在爱尔兰西南部发现了古代洞穴艺术。
Oh, ancient art.
哦，古代艺术。
How old is it?
它有多古老？
The art has been dated to about 15 ,000 years ago.
这项艺术的年代被追溯到大约 15,000 年前。
This is a massive deal, because it pushes back the known timeline of human presence on the island of
这是一件大事，因为它推迟了已知的人类在爱尔兰岛上的存在时间线
Ireland by roughly 5 ,000 years.
大约推前了 5,000 年。
Previously, scientists believed humans didn't arrive there until about 10 ,000 years ago. Wow!
此前，科学家认为人类直到大约 10,000 年前才到达那里。哇！
So people were walking around and making art in Ireland much earlier than we thought.
因此，人们在爱尔兰散步和创作艺术的时间比我们想象的要早得多。
I love how we're using modern computer algorithms to find historical treasures hidden deep inside
我喜欢我们利用现代计算机算法来寻找隐藏深处的历史宝藏
dark caves.
在黑暗的洞穴深处。
It is a beautiful marriage of technology and history.
这是技术与历史的完美结合。
Next up, a new evolutionary study has looked into why humans walk the way we do.
接下来，一项新的演化研究探讨了为什么人类会以我们的方式行走。
Researchers found that our unique heel strike style of walking, where our heel hits the ground
研究人员发现，我们独特的脚跟着地行走方式，即脚跟首先接触地面
first, allows us to conserve an immense amount of energy over long distances.
首先，使我们能够在长距离行走中节省大量的能量。
Wait, so heel -to -toe walking is an energy -saving feature?
等等，所以从脚跟到脚尖的行走方式是一种节能特征？
I thought that was just how legs worked.
我以为那只是腿的工作方式。
Actually, many animals, like dogs, cats, and even chimpanzees, walk on their toes or the balls of
实际上，许多动物，如狗、猫、甚至黑猩猩，都是用脚趾或脚掌前部行走
their feet.
它们的脚。
Our heel strike style is quite rare.
我们的脚后跟着地方式相当罕见。
By landing on our heels, we extend our stride and use our body weight to roll forward, which uses
通过脚后跟着地，我们拉长了步幅，并利用体重的惯性向前滚动，这
much less muscle energy.
消耗的肌肉能量要少得多。
The study suggests this efficient gait is exactly what allowed early humans to walk incredibly long
研究表明，这种高效的步态正是让早期人类能够进行超长距离
distances, migrate out of Africa, and populate the globe. Fascinating!
行走、迁徙走出非洲并居住在地球各地的原因。太引人入胜了！
But is there a downside to landing on our heels?
但是脚后跟着地有弊端吗？
There is.
的确有。
It creates high -impact forces that shoot straight up our legs, which can be tough on our joints.
它会产生巨大的冲击力，直接传导至腿部，这对我们的关节来说是个考验。
This is why humans eventually had to invent running shoes with plenty of heel cushioning.
这就是为什么人类最终不得不发明带有大量脚跟缓冲功能的跑鞋。
A perfect, high -tech solution to an evolutionary trade -off.
这是对演化权衡取舍的一个完美、高科技的解决方案。
That explains why my running shoes feel so bouncy. Exactly.
这就解释了为什么我的跑鞋感觉这么富有弹性。一点没错。
And our final short story today takes us to space.
我们今天的最后一个简短故事将把我们带向太空。
A very small asteroid named 2026RW1 hit Earth's atmosphere on Sunday near Australia, burning up
一颗名为2026RW1的极小小行星于周日在澳大利亚附近坠入地球大气层，并在空中
harmlessly in a brilliant flash.
在一道璀璨的闪光中无害地烧毁。
An asteroid hit us?
有一颗小行星撞击了我们？
That sounds terrifying, Daniel.
听起来太可怕了，丹尼尔。
Did we have any warning?
我们收到过任何预警吗？
We did, but only a brief one.
有的，但仅仅是非常简短的预警。
Scientists discovered the asteroid just seven hours before it impacted.
科学家们是在这颗小行星撞击前仅仅七小时才发现它的。
While seven hours sounds short, this is actually a major scientific triumph.
虽然七个小时听起来很短，但这实际上是一项重大的科学胜利。
It is only the 13th time in human history that an asteroid has been detected before impact.
这是人类历史上仅仅第13次在小行星撞击前检测到它。
Seven hours is better than zero hours.
七个小时总比零个小时好。
It shows that our telescopes and planetary defense systems are getting incredibly good at spotting
这表明我们的望远镜和行星防御系统在发现
even tiny space rocks before they arrive.
微小的太空岩石到达之前，正变得极其擅长捕捉它们。
It really does.
确实如此。
It was a perfect, harmless drill for global asteroid tracking networks.
对于全球小行星跟踪网络来说，这是一次完美且无害的演练。
What a fascinating morning of news.
真是个令人着迷的新闻早晨。
From the rapid birth of our moon to the evolution of our own footsteps, science never ceases to
从月球的快速诞生到我们人类自己脚步的演变，科学从未停止过
amaze me.
让我惊叹。
It certainly does not.
它当然没有。
And that brings us to the end of today's episode of Talkcast. Talkcast.
今天的Talkcast集到这里就要结束了。
Before we sign off, we have an exciting question for you, our listeners, based on today's stories.
在节目结束前，根据今天的故事，我们为各位听众准备了一个令人兴奋的问题。
If you could travel back in time to witness one major event, like the five -hour collision that
如果你能穿越时空去见证一个重大事件，比如形成月球的那场持续五小时的碰撞，
formed our moon, or early humans taking their first long -distance steps out of Africa, which one
形成了我们的月球；亦或是早期人类走出非洲跨出的第一步长途跋涉，你会
would you choose to see and why?
会选择看哪一个，为什么呢？
Oh, that is a tough choice.
哦，这真是个艰难的选择。
But I think I would choose the moon creation.
但我认为我会选择月球的诞生。
What about you?
你呢？
Please share your thoughts in the comment section below and take a look at what other listeners are saying.
请在下方的评论区分享你的想法，并看看其他听众都在说什么。
We absolutely love reading your creative answers.
我们非常喜欢阅读大家充满创意的回答。
Yes, your feedback keeps us going.
是的，你们的反馈是我们前行的动力。
Don't forget to subscribe to Talkcast on your favorite podcast platform and share this episode with
别忘了在您最喜爱的播客平台上订阅 Talkcast，并将本期节目分享给
your friends who love science or are practicing their English.
你身边热爱科学或正在练习英语的朋友。
And a quick reminder for our English learners, the complete written transcript of today's episode is
另外，快速提醒一下英语学习者，今天节目的完整文字逐字稿已经
published regularly on our official WeChat public account, Talkcast.
定期发布在我们官方微信公众号 Talkcast 上。
It is a fantastic tool to read along while you listen, so make sure to check it out.
这是一个边听边读的绝佳工具，所以一定要去看看。
Thank you all so much for your warm support.
非常感谢大家的热情支持。
Have a wonderful morning and we will see you tomorrow.
祝大家度过一个美好的早晨，我们明天见。
Goodbye, everyone.
再见，大家。
