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10 Things About the Universe That we may Never Understand


10 Things About the Universe That we may Never Understand

An exploration of 10 aspects of the universe that we may never understand, no matter how long we study science.

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25 Space Facts That Will Both TERRIFY And AMAZE You

25 Space Facts That Will Both Terrify And Amaze You | List25
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Space, the final frontier. There is still very little that we actually understand about the vast universe that we live in. However, what we do know is that space is very clearly trying its best to kill us all. From deadly radiation to exploding super-stars, the galaxy is dangerous enough to make even the bravest (or craziest) astronauts think twice before deciding to exit our nice, protective atmosphere. Still, the human race is determined to go out and explore the cosmos, so just to make sure we know exactly what we're getting into, here are 25 Space Facts That Will Both Terrify And Amaze You.

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The Speed of Light
The Moon
Black Holes
Gamma Rays
Zero Gravity
Cold Welding
Alien Life
Rogue Planets
Travel Times
Extreme Temperatures
The Darkness
Musculoskeletal Atrophy
Dark Matter/Dark Energy
Background Radiation
The Expanding Sun
Electromagnetic Vibrations
Everything Can Kill You
Time Dilation
Hypervelocity Stars
Solar Flares
The Big Crunch/Big Rip

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25 Shocking Things That Are Not As Dangerous As You May Think (Featuring Cody's Lab):

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5 Theories About The Universe That Will Blow Your Mind

5 theorist about the universe that will blow your mind. We take a look at these 5 theories about the universe that will bow your mind.

Advancements in quantum mechanical theories and new technologies that allow us to better perceive our universe and understand the answers to questions we never believed possible to answer seem to be developing every single day as research scientists work to provide us with new insights and revelations to our universe that break the boundaries of what we ever thought was possible.

From these findings will often spawn new theories and enlightenment's that will cause even the most stoic of people the need to sit back and collect their thoughts in order to come to terms with theories that are so mind blowing, they are often groundbreaking in their own right. So today, we will be visiting 5 theories about our very own universe that will absolutely blow your mind.

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10 Spooky Things the Universe Does that are Invisible

An exploration of 10 Spooky Things the Universe Does that are Invisible in celebration of Halloween.

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10 Ways We May Have Already Detected Alien Life

An exploration into ten potential ways that we may have already detected alien life in the universe.

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Why we might be alone in the Universe

There are trillions upon trillions of stars and worlds in our Universe. Faced with such large numbers, it's tempting to conclude that there must surely be other life out there, somewhere. But is this right? Could the probability of life beginning be a number so small that we are alone? A video essay by Professor David Kipping.

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Further reading and resources:
► Chen, Jingjing & Kipping, David (2018), On the Rate of Abiogenesis from a Bayesian Informatics Perspective, Astrobiology, 18, 12:
► Hanson, Robin (1998), Must Early Life Be Easy? The Rhythm of Major Evolutionary Transitions:
► Benzene in space materials and story:
► Columbia University Department of Astronomy:
► Cool Worlds Lab website:

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► The Sun is Scheduled to Come Out Tomorrow (
► Music from Neptune Flux, We Were Never Meant to Live Here (
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► Music from Neptune Flux, Stories About the World That Once Was (
► Waking Up by Atlas, licensed through
► Cylinder Two (
► Piano cover of S.T.A.Y. (Hans Zimmer) byt Jordie Eskes:

Video materials used:

► Intro/outro video by Miguel Aragon of Johns Hopkins University with Mark Subbarao of the Adler Planetarium and Alex Szalay of Johns Hopkins using Sloan Digitial Sky Survey data:
► Bacteria videos from Nikon Small World competition: and
► Tour of the J. Craig Venter Institute by Hedrich Blessing Motion and Sound:
► Tardigrade footage:
► Yellowstone park footage:
► Bill Nye interview with Rita Braver aired on CBS Sunday Morning July 10 2016:
► Neil deGrasse Tyson interview with Charlie Rose aired on PBS May 26 2015:
► Carl Sagan interview with Charlie Rose aired on PBS May 27 1996:
► Brian Cox interview on This Morning, ITV aired December 2 2014:
► Milky Way animation by Stefan Payne-Wardenaar:

Films clips used:
► Star Trek: The Next Generation
► Them! (1953)

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Why We May Be the Only Intelligent Life in the Universe with David Kipping of Cool Worlds

Are We Alone? Are we the only intelligent life in the universe? Are there alien civilizations?

Prof. David Kipping of the Cool Worlds lab at Columbia University spoke with John Michael Godlier about his most recent paper. What are the odds for intelligent life? Are there alien civilizations in the galaxy? Or are the odds against intelligent life?

Prof. Kipping attempts to find answers to these questions using a Bayesian Analysis to look at life’s early start and our late arrival. The rare earth hypothesis argues that the origin of life and the evolution of biological complexity required an improbable combination of astrophysical and geological events and circumstances.

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Kipping, D. 2020, An Objective Bayesian Analysis of Life’s Early Start and Our Late Arrival, PNAS:

Carter, B. 2007, Five or six step scenario for evolution?, Int. J. Astrobiology 7, 177:

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Pay Attention To These Signs! The Universe Is Trying To Tell You Something

11 Signs The Universe Is Trying To Tell You Something.

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Many strange things might happen to us. While most times we'll just think of it as a coincidence, sometimes it's actually the universe that is trying to tell us something.

The universe always works in mysterious ways. Base on the law of attraction, the universe provides us the resources, the people, or the lessons that we need to become the person we're meant to be. However, it doesn't always make these things obvious to us, so most times we never even thought about it. Sometimes it makes our lives easier, and some other time we may have to suffer from unbearable pain before finally learning the lesson.

But no matter what it is, it becomes an exciting aspect of our life to learn and know how to identify if the universe is actually trying to send a new message for us.

Apart from your belief, these are the signs that the universe is trying to tell you something, and you better listen to it.


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Questions No One Knows the Answers to (Full Version)

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In the first of a new TED-Ed series designed to catalyze curiosity, TED Curator Chris Anderson shares his boyhood obsession with quirky questions that seem to have no answers. (Introducing the series Questions no one knows the answers to)

Questions No One Knows the Answers to was animated by Andrew Park (

What we know for certain about the universe—and what we don't | Michelle Thaller | Big Think

What we know for certain about the universe—and what we don't
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If we ever discover the true size of the universe—is it infinite or just too big to measure?—we'll likely have galaxies to thank. The trillions of massive star clusters we've observed are sending light from the early universe back to us. But our measuring instruments—the strongest of which is NASA's Hubble Space Telescope—aren't powerful enough to detect light from furthest points of the universe. But in 2020, the James Webb Telescope should be able to, revealing a truer number of galaxies and perhaps the boundaries of the universe itself.

Dr. Michelle Thaller is an astronomer who studies binary stars and the life cycles of stars. She is Assistant Director of Science Communication at NASA. She went to college at Harvard University, completed a post-doctoral research fellowship at the California Institute of Technology (Caltech) in Pasadena, Calif. then started working for the Jet Propulsion Laboratory's (JPL) Spitzer Space Telescope. After a hugely successful mission, she moved on to NASA's Goddard Space Flight Center (GSFC), in the Washington D.C. area. In her off-hours often puts on about 30lbs of Elizabethan garb and performs intricate Renaissance dances. For more information, visit NASA.

MICHELLE THALLER: Evie, you ask a wonderful question: how many galaxies are there?

And this is something that we actually don’t know the answer to, but I can tell you a wonderful story about what we do know.

So let me first talk about what a galaxy is. And a galaxy is a family of stars, but usually in the hundreds of billions of stars. We live in a galaxy called the Milky Way and there are about 500 billion stars, we think, in the Milky Way Galaxy. Galaxies are absolutely huge.

The Milky Way Galaxy is about 100,000 light-years across, and that’s not really a number I can get my mind around, seeing as one light-year is about six trillion miles, so our single galaxy is 100,000-times-six-trillion miles across. It’s absolutely huge.

The best analogy I know is that if you think about the sun—the sun is a giant thing, the sun is so big you can fit a million Earths inside it. It’s really, really big. And if we made the sun the size of a dot of an “i”, so pretend that the sun is only the size of—like take a regular page of a book, look at the dot of an “i”, if the sun were that big, how big would our one Milky Way Galaxy be? It would be about the size of the earth. So that’s how big a single galaxy is.

If the sun were the dot of an “i”, the Milky Way galaxy would be roughly the size of our planet.

Now how many galaxies do we know of?

And this is a wonderful result from the Hubble Space Telescope. The Hubble Space Telescope decided to try to answer that question, and what it did is it looked at an area of the sky that, as far as we knew, was blank, it was just black; we couldn’t see many stars there, we didn’t see any galaxies there, and it decided to take a very, very deep distant look at the universe.

Now, the way the Hubble Space Telescope (and any camera) works is it works kind of like a “light bucket.” You can actually open up the eyes of the telescope and tell it to just keep staring, and the longer it stares the fainter and more distant objects you can see.

For those of you that like photography, it’s called doing a time exposure. You leave your camera open for a certain amount of time and you can see fainter and fainter things.

Well, incredibly, the Hubble Space Telescope kept its eyes open on this one little part in the sky for more than a month, and it just let any light come and build up this beautiful image, and what we discovered is that in this empty part of the sky—empty we say!—we counted over 5000 galaxies. Five thousand galaxies we didn’t even know were there. They were just so faint we’d never seen them before.

When we finally had a sensitive enough telescope up in space and we were able to keep it staring at a tiny little part of the sky for a month 5000 galaxies turned out to be hiding there that we’d never seen.

So, how much of the sky was this tiny little part that the Hubble Space Telescope looked at?

So let’s go back to the dot of an “i”. So think about the dot of an “i” in a book, and now hold of that book at arm’s length. It’s a tiny...

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10 Terrifying Facts About Space

Here are 10 fascinating facts about Space that will also terrify you.

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10 Terrifying Facts About Space

10 Best Places in the Universe if you're a Human (collab with Paul Sutter)

An exploration into the best places in the universe for humans. This is a two part collaboration with Paul M. Sutter.

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10 Ways Alien Life Could be Radically Different from Earth

An exploration of alternative hypothetical biochemistries different from that of earth life that could serve as a basis for exolife.

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Why We Might Be Alone in the Universe

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Why does it appear, that humanity is the lone intelligence in the universe? The answer might be that planet Earth is more unique than we've previously assumed. The rare earth hypothesis posits exactly this - that a range of factors made Earth exceptionally unusual and uniquely able to produce intelligent life.

In upcoming episodes we’ll be exploring the anthropic principle and its two main versions - the strong and the weak anthropic principles. The strong anthropic principle tells us that the observed universe must be able to produce observers - including the contentious idea that this predicts the existence of universes beyond our own. But in today's episode we’re going to focus on the weak anthropic principle. It says that we must find ourselves in a part of the universe capable of supporting us. For example, in a planetary biosphere rather than floating in the void between the galaxies. This may seems tautological, but accounting for this observer selection bias is important to understanding why the universe looks the way it does from our perspective. And the weak anthropic principle is much more useful than that. When combined with the apparent absence of alien civilizations, it may tell us why intelligent life is incredibly rare in our universe.

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The Most Dangerous Thing in the Whole Universe

Are you afraid of alien invasions or giant meteors rushing toward Earth? Oh, forget about them! There’s something much more dangerous lurking in space, and it’s called strange matter. While people don't know much about it, experts are sure that under particular conditions, this stuff would be able to eat our planet alive!

Imagine a jar of honey that suddenly goes nuts and decides to consume everything around: the table, plates, your kitchen, you, the whole galaxy! That's exactly what may happen if the strange matter was left to roam on its own. But would there be a way to stop all this from happening?

Other videos you might like:
The Bermuda Triangle Mystery Has Been Solved
The Great Pyramid Mystery Has Finally Been Solved
How Deep Can You Possibly Dig?

What's so unique about neutron stars? 0:35
How just one teaspoon can weight 10 million tons 1:31
Strange quarks. What is it? 2:34
Strange matter may be... contagious! 4:01
Is it really so dangerous? (Oh, yeah!) 5:04
Could we stop it? 5:49
How to avoid becoming spaghetti 6:46
What physicists say 7:48

#space #blackhole #strangemater

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Cartoon fantastic planet, worlds asteroid set. cosmic, alien space element for game: Designed by vectorpouch/Freepik,
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Music by Epidemic Sound

- Imagine this: a super powerful and massive star is reaching the end of its life. If the star had been massive enough, it’ll produce a black hole. But if it wasn't that big, a neutron star will appear in its place.
- Scientists say that one day these neutrons can get tired of holding all that weight, and the structure keeping the entire thing together will collapse. This leads to the appearance of a quark star.
- The pressure inside a quark star is getting stronger. As a result, things called “strange quarks” can appear in its core. They’ve been dubbed “strange” because, well, they don’t behave like normal quarks.
- But strange matter – oh, that's a bundle of chaos! Here’s where the “strange” part comes in. Its quarks have no boundaries – they just run totally amok wherever and however they want.
- When two neutron stars collide or when a neutron star crashes into a black hole, these strangelets break free. Sadly, a strangelet wouldn't care whether the object it's encountered is a star or a planet full of life!
- To get rid of strange matter, the only thing we could do is toss it into a black hole. But this escape plan raises all kinds of questions itself.
- But as soon as you get to the black hole’s edge, aka the event horizon, you won't be able to turn back because it’s the point of no return.
- Everything that approaches a black hole gets broken down into individual atoms. And we become long thin pasta.
- At this point, strange matter is just a theory that hasn't been confirmed yet. Physicists have considered creating strange matter in a particle accelerator. Luckily, they later came to the conclusion that it's impossible to do since particle accelerators get so hot that they’d immediately melt any appearing strangelets.

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Visualizing the Planck Length. Why is it the Smallest Length in the Universe?

Visualizing the smallest size in the universe – Planck Length & why you can’t go smaller
Visualizing Planck length – why is it the smallest in the universe? Graphics courtesy of Michael and Cary Huang:

The scale of the universe is bigger than you can imagine. It is also smaller than you can imagine. The smallest lenth theorized to be possible, the Planck length is about 4 X 10^-35 meters. Just imagine things that are about the size of your body. Things like the giant earthworm that lives along streams in Australia. Or a big beachball, which can be found near oceans and beaches all across America.

Now, lets go smaller by one order of magnitude, so now we are looking at things that are on the scale of about 10 centimeters. These are things like the shrew, or a chicken egg.

Now let’s go a thousand times smaller than the scale of a human being, on the order of 1 millimeter or one thousand of a meter. Here, you’ll find things like a grain of sand or dust mites.

Let’s go 1000 times smaller than this scale. Now we are going a hundred times smaller than the width of a human hair. And ten times smaller than even bacteria. Here, we are going to find things like large viruses.

Let’s keep going to 1000 times smaller this. This is nanometers, or one billionth of a meter. Now we are exploring a universe that we can’t see with optical telescopes. This is on the scale of the size of molecules like DNA and the glucose molecule, that your body uses as its source of energy. And the scale of the biggest atom – cesium.

Let’s go 1000 times smaller than this. This is one trillionth of a meter. This is on the order of the wavelength of gamma rays. This is the highest energy electromagnetic radiation, consisting of the most energetic photons.

Let’s go 1000 times smaller than this. This is 1X 10^-15 or one quadrillionth of a meter. This is the size of particles that make up the nucleus of all atoms, protons and neutrons. The size of a typical atom is however is 100,000 times bigger than its nucleus.

You would think that we are getting close to the smallest size theorized to exist – the plank length. But we are nowhere close. You have to go a quadrillion times smaller than one quadrillionth of a meter, or 1 X 10^-30 of meter….and you would still need to go another 100,000 times smaller than that, or 1 X 10^-35 meters. Then you would be at the plank length. In fact, if an atom was the size of the earth, a planck length would be smaller than the size of an atom – it would be about the size of a proton.

But What exactly is a Planck length and why is it the smallest length?

Planck length is actually derived from the fundamental constants of the universe that define the properties of space-time: The speed of light – c which signifies the maximum speed of communication in the universe. The gravitational constant – G, which signifies the magnitude of gravitational force between two massive objects. And the reduced Planck Constant – h bar, which links how much energy a photon carries depending on its electromagnetic frequency.

These are really the only constants that define the fundamental properties of the universe and all its contents. By taking different mathematical combinations of these constants, and reducing their units, you can get a length. By similar mathematical manipulation, you can also get planck time and planck energy.

But what does this length mean? Why is it significant?

It is the smallest length at which gravity would have an effect. It is the scale and size of the strings in string theory. It is also the scale at which space-time is theorized to become quantized in Loop quantum gravity theory.

So why is it the smallest length? In 1964, C Alden Mead determined that using the known laws of quantum mechanics and laws of gravitation, it is impossible to determine the position of an object to a precision smaller than the Planck length. So from what is currently known about quantum mechanics, a length smaller than the Planck length has no meaning.

Note that I said “known” laws. It is possible that at lengths smaller than the Planck scale, gravity or quantum mechanics behaves completely differently, that we may not yet know about. This is quite possible. So until we find out what happens at such small scales, we will need to wait for a future Einstein to reveal this to us.

One of the remarkable things about Planck length is that since it is derived from the fundamental constants of the universe, which by definition applies to everything, it will be the same no matter what language you might speak, what units you might use, or even what planet you might come from.

Ao, if we ever come across aliens from another world and compare notes, we both will have the same length for the smallest length possible in the universe.


10 Mind-Blowing Things You Didn't Know About The Universe

Top 10 Amazing facts about the universe

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The universe is full of infinite wonders, strange sights, and unexplained mysteries. Whether or not they understand the science behind it, humankind has always looked to the shifting constellations and falling stars for guidance, searching for a deeper purpose in the natural order of the heavens. As NASA explores the unknown and new technologies take us to uncharted territory, the wide expanse of space promises exciting discoveries.

Stars live and die and live again as nebulae or white dwarfs or pulsars. Black holes suck all the light in their vicinities and yet we’ve never actually photographed one head on. Inexplicable combinations of elements create beautiful possibilities in deep space while chemicals that could easily be found in your medicine closet float inconsequentially through the cosmos.

While there’s still much to learn about Earth as it hurtles through the vacuum, we here at the Hub have managed to curate 10 mind blowing facts about the big ole universe you probably didn’t know. If you don’t have a telescope at your disposal, gaze through your web browser to take in the interstellar bodies and cosmic anomalies that are reinforcing and, often, defying our perceptions of time and space.

10 Things About the Universe That we may Never Understand | AMAZING FACTS About the UNIVERSE

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10 Things About the Universe That we may Never Understand 20 AMAZING FACTS About the UNIVERSE! to my Twitter
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10 Things About the Universe That we may Never Understand GRAVITY

This is specifically edited to the topic of Gravity.

3 Important Questions No One Knows The Answers To (Universe Edition)

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In this video, we delve into 3 essential mysteries that sit inside every moment and realize how little we know about anything and everything. And perhaps why that's ok.

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