字幕表 動画を再生する 英語字幕をプリント the universe has countless mysteries, but what is the biggest of them all? No, it's not the contents of your mom's handbag. It's even the name suggested something strange and it ISS. Scientists have long been hunting for this elusive thing, and they've made some disturbing discoveries about it. But first you may be asking why you should even bother about door in the first place. The answer is both very simple and very complicated. Young Jett I The easiest explanation is that dark matter, okay is actually all around us. We just can't see it. In fact, scientists have long been wondering if it even exists at all. It came to light. If dark matter can even do that on Lee. In the last few decades, when astrophysicists around the world realized that they simply don't know what the universe is largely made off, there are stars, planets, black holes and other celestial bodies. Then there's cosmic dust. And then again, there's this enormous pool of, well, nothing. But there must be something there in that nothingness because there's gravity coming seemingly out of nowhere and that something is probably dark matter. But I'm getting ahead of myself back to earth. Like I said, dark matter is everywhere invisible to us, and physicists are almost positive we can find traces of it. A recent study by Glenn Starkman and judge It's saying, Sid, you from case Western Reserve University is dedicated to doing just that. The scientists have come up with an outrageous yet revolutionary question. What if we could use humans as indicators of dark matter? In their study, they wanna prove that extremely large particles not only exist but also interact with our world. I'll explain. You know about atomic particles, right? You have neutrons, protons, electrons and morons. Well, simply put on Lee. Three of those are particles that make up everything material in the universe. They're so tiny you can't see them without a powerful microscope. But who says particles have to be so small? Especially when it comes to such a mysterious substance as Okay, go ahead. What the researchers air trying to prove is that extra large particles they call them Mac Rose can really be out there. The range of their size can be anywhere from his large as a planet to a small as a bullet, and they'd be flying at incredible speeds. The problem is that dark matter lies in a spectrum that can't be seen with human eyes and even precise equipment can't really detect it. But a speeding bullet made of this substance would definitely interact with the rest of the world. So the scientists decided to locate. The place is such interactions could take place, and the most obvious yet still weird solution lay on the surface. Humans they could learn whether any human being suffered from meeting such a dark matter bullet. Just imagine an invisible ultra high speed particle comes into contact with the human body. I don't think I need to explain what happens next. So the researchers studied medical and forensic documents they could get their hands on or in search of such unexplained cases. Unfortunately, they couldn't find any proof that people really got in the way of a dark matter particle flying by. But they're not discouraged by their bad luck. First, they could only get so much information from open sources. Secondly, the sample size was limited to the U. S. A. Canada and Western Europe as countries with the most reliable data recording. And finally, there's always the human factor. Can you imagine a doctor filling a report that a person was shot from a weapon unknown to humankind? So, pal, what happened? Got shot by a UFO? People like to be in the know, so there's no guarantee someone wouldn't just write what they think was correct and not the actual truth. Anyway. If dark matter, bullets able to hurt people don't really exist. Oh, how I hope they don't. It doesn't mean they're kind doesn't exist it all. It only means that they're not dense or massive enough to do any harm to a person, So the search for super large dark matter continues. But now the researchers have switched from using humans as detectors to locating traces of it on more permanent surfaces. Stone, for example, if a dark matter bullet goes through a granite slab, for instance, the stone would melt and then the whole would recover. But already with a different pattern on it, scientists hope to find such melted holes and ancient structures and teach people to do it as well. And if they find them, it will prove the existence of dark matter super particles. But what was that about planet sized particles. Is this even possible? Well, science says it is, and there's good reason to believe it. You see, like I mentioned earlier, dark matter feels gravity, and although it's rather weak in cosmic terms, it only means that the mass of such particles is not as high as that of other objects in space. But the mass doesn't always have to do with size, and a smaller object can easily be more massive than a much bigger one. Take black holes, for example. They're not that large themselves, but even the smallest ones we know about have amassed several times higher than that of our sun. So dark matter particles might be huge but still weigh less than other stuff surrounding them in space. Now can our planet collide with one of such particles, by any chance? And what would happen if it did? Fortunately for us, no, it can't. I'm saying this with a certainty because there's another study conducted by researchers from NASA's Jet Propulsion Laboratory in Pasadena, California Scientists found out that dark matter forms extremely long streams throughout the universe, and they criss cross our own galaxy as well. The catch is that those streams air like hairs growing out of Earth, but not directly from it. The roots of these hairs are about 600,000 miles away from our planet, and their tips would be about twice that distance. For us, it means two things at once. First, we're surrounded by an unbelievable amount of dark matter, but it's all too far away for us to notice it in any way. It springs in all directions, yet the streams of it are moving away from our planet. There's no dark matter closer to us than the roots of those hairs, so we couldn't interact with it even if we wanted to. And second, which is more of a potential scientific breakthrough. If we locate at least one root of this dark matter hair, we could send a probe there and get a whole lot of information. If this happens, scientists will be overjoyed because dark matter is the most elusive thing in space. Yet if studied properly, it could even turn everything we know about the universe upside down. And finally, perhaps the biggest question that doesn't let sign to sleep at night is what exactly keeps all that dark matter expanding as you might know the universe is constantly growing in all directions, and it's doing so at mind, blowing speeds thousands of times faster than the speed of life. But there's gravity all over space, and objects are constantly pulled together by one another. So how come the universe just doesn't collapse on itself under all this gravitational weight? Scientists believe that's because there's yet another invisible force At work. Here are even more. They think it makes up about 3/4 of the universe. You can't see or touch it, and no equipment is able to detect it. Just the same as with dark. Matter is pure theory today, but there's simply no other explanation to how our universe can even work. If dark energy exists, it can create a sort of counterweight toe all the gravity made by planets, stars, black holes and other objects. On top of that, there should be much more dark energy in space, and there's anything else. Otherwise, the universe would not be expanding at such an incredible speed. The main problem with this theory is that once again, we have no means to verify it. But the scientific progress isn't at a standstill. so researchers hope one day to prove the existence of both dark energy and go for it door Adeboye. So what do you say? Do you believe in invisible dark matter bullets? After seeing this video, let me know down in the comments. Hey, if you learn something new today, then give this video alike and share with a friend. But don't go chasing dark matter just yet. 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