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27:08

Astrophysicist Rates The Science Of 9 Outer Space Movies And TV Shows | How Real Is It? | Insider

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610K views 2 months ago

00:01:00

NASA is running out of spacesuits. #nasa #spacetravel #spacerace

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1 views 2 years ago

00:08:38

Could Lab-Grown Salmon Be The Future Of Fish? | Lab-Grown | Science Insider

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1 views 3 years ago

00:12:46

Sleep Experts Debunk 13 More Sleep Myths | Debunked | Science Insider

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1 views 3 years ago

,Sleep experts Girardin Jean-Louis and Rebecca Robbins debunk 13 more myths about sleep. They talk about the effects of hitting snooze, how to deal with jet lag, and the importance of sleeping positions in getting a good night’s sleep. They also explain the dangers of sleep apnea — in fact, it can be life-threatening if left untreated. Jean-Louis is a professor of psychiatry and behavioral sciences at the University of Miami. His research primarily focuses on sleep and circadian health. He was previously a professor of population health and psychiatry at NYU Langone Health. You can learn more about his past work here: https://med.nyu.edu/faculty/girardin-jean-louis Robbins is an instructor in medicine at Harvard Medical School and an associate scientist at the Brigham and Women’s Hospital. Her work involves designing behavioral interventions to improve sleep and circadian health. You can learn more about her work here: http://www.rebecca-robbins.com/ Timecodes: 0:00 Intro 0:42 It's better to be a morning person than a night owl 1:30 Sleeping positions don’t matter 2:31 The cure for jet lag is not sleeping all night 3:25 Hitting snooze will give you extra meaningful rest 4:34 Napping makes up for lack of sleep at night 5:03 Taking melatonin will make you fall asleep immediately 5:56 If you pulled an all-nighter, sleep as soon as possible 6:51 Dreams only last for a few seconds 7:47 If you snore, you have sleep apnea 8:56 Insomnia means you can't fall asleep 9:34 If you can fall asleep anywhere and at any time it means you're a "good sleeper" 10:26 More sleep is always better 11:11 Nightmares and night terrors are the same MORE DEBUNKED VIDEOS: Sexologists Debunk 17 Sex Myths | Debunked https://www.youtube.com/watch?v=XKC30lBYJ4U Dietitian Nutritionists Debunk 19 Diet Myths | Debunked https://www.youtube.com/watch?v=7YBvKATG6OQ Physical Therapists Debunk 14 More Exercise Myths | Debunked https://www.youtube.com/watch?v=z5ExSVP4Mco ------------------------------------------------------ #Sleep #Debunked #ScienceInsider Science Insider tells you all you need to know about science: space, medicine, biotech, physiology, and more. Visit us at: https://www.businessinsider.com Science Insider on Facebook: https://www.facebook.com/BusinessInsi... Science Insider on Instagram: https://www.instagram.com/science_ins... Business Insider on Twitter: https://twitter.com/businessinsider Tech Insider on Twitter: https://twitter.com/techinsider Business Insider/Tech Insider on Amazon Prime: http://read.bi/PrimeVideo Sleep Experts Debunk 13 More Sleep Myths | Debunked | Science Insider

00:04:21

Can Lab-Grown Meat Become The Food Of The Future?

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1 views 4 years ago

00:04:40

What If You Stopped Sleeping

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1 views 4 years ago

00:05:13

Two Truths And A Lie About The Coronavirus

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1 views 4 years ago

00:03:41

What The Keto Diet Actually Does To Your Body | The Human Body

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1 views 6 years ago

,The ketogenic diet, or keto, has become a popular way to lose weight. The high-fat, low-carb diet is a drastic change from the diet that the USDA recommends for Americans. It’s also a huge change for your body’s metabolism. And while keto is proven to help you shed the pounds, the diet can come with some side effects, like the notorious keto flu.The high-fat, low-carb ketogenic diet, or keto for short, has become a popular way to lose weight. And while keto is proven to help you shed the pounds, it’s a huge change for your body’s metabolism and can come with some serious side effects. Following is a transcript of the video: Step aside Atkins. There’s a new fad diet in town. The ketogenic diet, or keto for short. Celebrities like Halle Berry, Kourtney Kardashian, and Vanessa Hudgens all swear by it. And if losing weight is your goal, keto works! It’s proven to help you shed pounds fast. But there’s more to this diet than meets the eye.Keto basically replaces carbs with fat. A typical keto diet looks like this: 70% fat, 25% protein, 5% carbohydrates. It’s a drastic change from the diet that the USDA recommends for Americans: Less than 30% fat, 20-35% protein, at least 50% carbs, and it’s a significant change for your body’s metabolism too. Usually, when you eat carbs, like a starchy potato, enzymes in your mouth, stomach, and small intestine break them into a form of sugar energy, called glucose, which your brain and body use for fuel. So, when you skip out on carbs, the first couple of days you might experience some strong sugar cravings. Because your body is switching gears, from burning carbs to the only energy it has left: fat. Once you’re burning fat regularly, you’ll start to see the pounds melt away. Depending on your weight, you might lose up to 3.5 pounds within the first week. As you burn more fat, levels of insulin — the fat-storing hormone — will drop significantly. This triggers your kidneys to release large amounts of sodium into the blood. Which can actually lead to a common side effect known as the “keto flu.” Many keto dieters report symptoms like: Nausea, Headaches, Dizziness, Muscle cramps, and low energy levels. But most of these symptoms will only occur within the first couple weeks of starting the diet. After the first month, the scales will look better. But some of that lost weight isn’t actually fat. It’s water. Because some of the carbs you’ve metabolized include glycogen, which retains water and therefore helps keep you hydrated. As a result, you’ll likely pee more, which will lower your sodium levels even more, leading to: Dehydration, Constipation or diarrhea, and bad breath. Once you’re a couple months in you might hit the notorious keto plateau. It’s a common term in the keto community and refers to when people find it harder to continue losing weight. One study, for example, found that overweight people lost an average of 15 pounds in the first month. Another 11 pounds over the next two months. But after that, they saw no change in body weight — despite sticking to the keto diet. At this point, many people quit keto. That’s why researchers often find it hard to study the long-term effects of the diet. But, as it turns out, there is one group that typically sticks to keto. It’s unclear why, but keto has been proven to reduce the symptoms of epilepsy. And studies show that epileptic children who stay on very restricted keto diets for several years can suffer from: Kidney stones, High cholesterol, and bone fractures. But a typical keto diet won’t be nearly as strict and if you do want to try keto, you should talk to a doctor first. In the meantime, go ahead and enjoy that bread and remember, the best diet is a balanced one of fat, protein, and — yes, even — carbs. MORE FOOD SCIENCE CONTENT: Why It's OK To Eat A Brown Avocado https://www.youtube.com/watch?v=UBHylQFplHg I Stopped Eating Breakfast For Two Weeks And I'm Never Doing It Again https://www.youtube.com/watch?v=WxX-dSLtbF8 Why Hardly Anyone In Israel Is Allergic To Peanuts https://www.youtube.com/watch?v=2X7SabQBCJw ------------------------------------------------------ #Keto #Diet #ScienceInsider Science Insider tells you all you need to know about science: space, medicine, biotech, physiology, and more. Subscribe to our channel and visit us at: http://www.businessinsider.com/science Science Insider on Facebook: https://www.facebook.com/BusinessInsiderScience/ Science Insider on Instagram: https://www.instagram.com/science_insider/ Business Insider on Twitter: https://twitter.com/businessinsider Tech Insider on Twitter: https://twitter.com/techinsider ------------------------------------------------------ What The Keto Diet Actually Does To Your Body | The Human Body

00:03:21

What If The Most Powerful Nuclear Bomb Explodes In Space

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1 views 6 years ago

,During the Cold War, the US government launched a 1.4 megaton bomb into space. Starfish Prime, as the test was called, was the highest-altitude nuclear test in history. But what would happen if we tried the same experiment with a 50 megaton bomb, like the record-setting Tsar Bomba? ------------------------------------------------------ #Space #NuclearBomb Science Insider tells you all you need to know about science: space, medicine, biotech, physiology, and more. Subscribe to our channel and visit us at: http://www.businessinsider.com/science Science Insider on Facebook: https://www.facebook.com/BusinessInsiderScience/ Science Insider on Instagram: https://www.instagram.com/science_insider/ Business Insider on Twitter: https://twitter.com/businessinsider Tech Insider on Twitter: https://twitter.com/techinsider ------------------------------------------------------ Following is a transcript of the video: Imagine if we detonated a nuclear bomb in space? Actually, you don’t have to. You can see it for yourself. That was Starfish Prime — the highest-altitude nuclear test in history. In 1962, the US government launched a 1.4 megaton bomb from Johnston Island. And detonated it 400 km above the Pacific — about as high as where the International Space Station orbits today. The detonation generated a giant fireball and created a burst of energy called an electromagnetic pulse, or EMP, that expanded for over 1,000 kilometers. EMPs can cause a power surge, damaging electronic equipment in the process. And this one was no different. Across Hawaii, street lights went dark, telephones went down, and navigation and radar systems went out, not to mention the six, or so, satellites that failed. And all this came from a 1.4 megaton bomb. Tsar Bomba, which was the largest nuclear bomb that has ever been detonated, was 50 megatons. So what would happen if we detonated that above the United States? For starters, there's no atmosphere in space. So, there would be no mushroom-shaped cloud and no subsequent blast wave or mass destruction. Instead, you’d get a blinding fireball 4 times the size of Starfish Prime’s. And if you looked directly at it within the first 10 seconds, you could permanently damage your eyes. Satellites wouldn’t be safe either. Radiation from the explosion would fry the circuits of hundreds of instruments in low-earth orbit. Including communication satellites, military spy satellites, and even science telescopes like the Hubble. Plus, astronauts on board the International Space Station might be at risk of radiation poisoning. On the ground, however, you’d probably be fine. The detonation point would be far enough away that the high-energy radiation wouldn’t reach you. But don’t get too comfortable. Remember Starfish Prime’s EMP? This time, the EMP would cover ⅓ of the entire United States, bringing down regional power grids and electronics like a lightning strike. But it’s not all doom and gloom. The radiation would also interact with oxygen and nitrogen in the atmosphere and create a spectacular aurora near the detonation site, that would last for days. Now, let’s be clear. This will probably never happen. Super-thermonuclear devices like the Tsar Bomba no longer exist. And even if they did, the Tsar Bomba weighed around 27,000 kilograms. There are only a couple of operational rockets in the world that could manage to lift something that heavy into space in the first place. So we're probably safe from that, anyway. This video was made in large part thanks to the calculations from physicists at Los Alamos National Lab.

00:03:20

What Really Happens During A Brain Freeze

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1 views 6 years ago

,Drinking cold beverages is a great way to fight off the summer heat, but if you drink too quickly, it could lead to a brain freeze. But is your brain actually getting cold? Science Insider tells you all you need to know about science: space, medicine, biotech, physiology, and more. Subscribe to our channel and visit us at: http://www.businessinsider.com/science Science Insider on Facebook: https://www.facebook.com/BusinessInsiderScience/ Science Insider on Instagram: https://www.instagram.com/science_insider/ Business Insider on Twitter: https://twitter.com/businessinsider Tech Insider on Twitter: https://twitter.com/techinsider -------------------------------------------------- Following is a transcript of the video: Ugh, brain freeze! It’s awful. That sharp searing pain in your forehead! But you know what’s even worse? Not everyone gets it! That’s right, some people can suck down as many milkshakes as they want and never feel a thing. Life is so unfair. And you know what else? These lucky people are ruining it for scientists, too. Brain freeze is one of those scientific mysteries that’s been around since the 1800s. Just throw it in there with UFOs and crop circles. We may never know the real reason behind them! Ok, maybe that’s a bit of an exaggeration. But here’s the thing: The leading theories for what causes a brain freeze have to do with a physical response that everyone should feel. The way scientists think it works is this: Brain freeze happens when something cold hits the roof of your mouth, where it triggers your trigeminal nerve. It’s the nerve in charge of sensations you feel around the front of your head. That’s why, when you freeze it to subzero temperatures, the pain is around the temples and forehead. In fact, different nerves cause pain in different parts of your head. A toothache, for example, can irritate the mandibular nerve, causing pain near the central skull. But when it comes to a brain freeze the source of the pain is different from most other headaches. Turns out, it’s more similar to why your feet and hands sting when they get too cold. Your body floods that area with blood to try and return it to body temperature and in the process, your blood vessels expand, which causes that throbbing pain. Similarly, during a brain freeze, blood vessels in your brain widen, sending a rush of blood to the roof of your mouth and, in the process, cause pain. Now, the trigeminal nerve is a natural part of the body. So, if it’s the real cause of brain freeze, then that means everyone should get it. So why do scientists estimate that only 37% Americans actually feel it? And for that matter, 41% of children in Taiwan and only 15% of the adults in Denmark, according to another study? Researchers can only speculate: Maybe the trigeminal nerve is less sensitive in certain demographics. One thing that does seem to be clear is that people who do experience brain freeze may also be more susceptible to another kind of mysterious headache: migraines. In one small study, 93% of migraine patients were also prone to brain freeze. Which has led researchers to suspect that the trigeminal nerve also plays a key role in migraines. Whatever the reason, just hang in there. Brain freeze usually only last 20-30 seconds. Go ahead and take that time to remember not to slurp so quickly next time.