The Great Sphinx of Giza is well-known all around the world. It's considered a wonder of the world – yet, is it still remains an unsolved mystery. They say that underneath there are more than several passages, small shafts, and accessible holes. What exactly is hidden there and why can't tourists enter it? I bet you don’t know the secrets of these 7 famous places. Mount Rushmore hides a secret room in one of its President's heads, while the Eiffel Tower has a secret apartment hidden from everyone's eyes. Let's uncover all of these secrets and take a look at what's hidden inside the world's most famous landmarks. #brightside TIMESTAMPS
Great Sphinx of Giza 00:00
Hor-em-akhet 01:20
Atlantis 02:00
Empty caves 02:50
Mount Rushmore secret 04:15
Empire State Building secret 05:30
The Eiffel Tower secret 07:05
Grand Central Station 08:00
Charing Cross Road 08:36
Secret lamppost 09:15 Preview photo credit: Rump of the Great Sphinx of Giza, looking east, with rump passage entrance at floor level, blocked by stones: By Mark Lehner, CC BY 4.0 https://creativecommons.org/licenses/by/4.0, https://commons.wikimedia.org/w/index.php?curid=112756649 Credit: CC BY 4.0 https://creativecommons.org/licenses/by/4.0: Man standing in the hole on the top of the head of the Great Sphinx of Giza. Pyramid of Khafre (right) and Menkaure (left) in the background. (December 15, 1925): By Raphael Giveon (1916-1985) – Archives Lacau, Centre Golenischeff, EPHE, PSL, https://commons.wikimedia.org/w/index.php?curid=112754975 By Mark Lehner: https://commons.wikimedia.org/w/index.php?curid=112756655 (Closeup of the entrance hole to the rump passage of the Great Sphinx of Giza), https://commons.wikimedia.org/w/index.php?curid=112756649 (Rump of the Great Sphinx of Giza, looking east, with rump passage entrance at floor level, blocked by stones), https://commons.wikimedia.org/w/index.php?curid=112758597 (Lower part of the rump passage of the Great Sphinx of Giza before excavation. Chamber 4 filled with rubble), https://commons.wikimedia.org/w/index.php?curid=112758604 (Upper part of the rump passage of the Great Sphinx of Giza, looking down from chamber 1, seeing chamber 2 and the beginning of the lower part). CC BY 2.0 https://creativecommons.org/licenses/by/2.0: Gustaves Apartment – Eiffel: By Serge Melki, https://commons.wikimedia.org/w/index.php?curid=24322058 Mount Rushmore: By Eric Friedebach – https://www.flickr.com/photos/146295701@N02/51107144919, https://commons.wikimedia.org/w/index.php?curid=108153379 The Police Box at the south east corner of Trafalgar Square probably late 1920s or early 1930s: By Leonard Bentley, CC BY-SA 2.0 https://creativecommons.org/licenses/by-sa/2.0, https://commons.wikimedia.org/w/index.php?curid=44969943 CC BY-SA 3.0 https://creativecommons.org/licenses/by-sa/3.0: The unfinished hall of records behind Abraham Lincoln's head, just as Gutzon Borglum left it: By Rachel.miller727, https://commons.wikimedia.org/w/index.php?curid=21684367 Charing Cross Road, London, looking North from its junction with Long Acre: By Gerry Lynch, 2005, https://commons.wikimedia.org/w/index.php?curid=317555 Little Compton Street indication: By Goodwillgames, https://commons.wikimedia.org/w/index.php?curid=17978602 CC BY-SA 4.0 https://creativecommons.org/licenses/by-sa/4.0: Vanderbilt Tennis Club in New York City's Grand Central Terminal in 2019: By Ɱ, https://commons.wikimedia.org/w/index.php?curid=75816057 Behind Mount Rushmore faces: By Runner1928, https://commons.wikimedia.org/w/index.php?curid=71542507 Animation is created by Bright Side.
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More There Is A Secret Room Under the Sphinx of Giza, See What It’s Hiding Videos

A4, A3, A1 paper size: what's hidden behind these letters and numbers? There are 11 sizes in the A series. And the countdown starts with format A0. And it's not zero paper – on the contrary, this large sheet of paper is as long as an adult's leg and as wide as a medium-sized dog. Time to sort out all the papers! Here's everything you needed to know about paper sizes. Why does the paper have an A format? And how many sheets of A4 paper would it take to cover our whole world? Next time your geometry teacher will tell you 'bring A4 paper', you're gonna know exactly what's behind this phrase. #brightside TIMESTAMPS
Origami 00:00
Paper size of half a soccer field 00:45
A4 paper 01:17
Planck length 01:50
A0 02:13
A1 02:34
A4 02:50
How paper is made 03:00
How to count sizes 05:33
A-144 06:55
Space-time sheet 08:15 https://www.instagram.com/brightside.official/
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More Complete Guide to Understanding Different Paper Sizes (What Is A1, A2, A3, A4 ect?) Videos

Imagine a city where the narrowest part is just 30 meters and the widest – 300 meters wide. And this city really exists! Yanjin is situated in China and is the world's narrowest city. It's stretched between two steep mountains and looks as if it squeezed itself into a really tight space. But there's no way to make the city wider, because of the mountains. Today more than 370,000 people live there. Why do they like the place so much and don't really think about moving? Would you like to visit this unusual place? Let's take a look inside the world's narrowest city. #brightside TIMESTAMPS
China’s Yunnan Province 00:00
The size of the city 00:40
Get lost in this city 01:42
Apartments 02:03
The Dancing Flower Festival 03:05
Old Town of Lijiang 04:40
People and nature unity 06:10 Animation is created by Bright Side. —————————————————————————————-
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Have you ever heard of 'the twilight zone of sleep'? No, it's not a place where vampires sleep or a name of a weird hotel in the middle of nowhere. It's a special technique that can make a true genius out of you. What does it consist of? And how to enter this zone to get a brain boost? The greatest minds: Leonardo da Vinci, Salvador Dali, Thomas Edison – all used this technique to get into the special zone of our brains. It allowed them to be creative and make breakthrough discoveries. Scientists believe that there're answers to the most critical questions for any person in this phase of sleep… #brightside TIMESTAMPS
Leonardo da Vinci's sleep 00:00
Salvador Dali's sleep 00:15
Thomas Edison 00:28
The "twilight zone" 00:43
The first phase of sleep 02:53
Creativity boost 03:40
The deepest phase of sleep 04:20
Non-REM sleep 04:42
Mice experiment 06:16
Sleep for rest 07:14 SUMMARY
– Leonardo da Vinci slept for 15 minutes many times during the day;
– Salvador Dali would fall asleep holding a metal spoon or key;
– Thomas Edison held balls in his hands as he tried to fall asleep;
– The "twilight zone" is called hypnagogia. It's the process of our brain's transition into sleep;
– You, too, had experienced such a state when you suddenly woke up in the night with some idea and quickly wrote it down in your notes;
– James Watson saw two intertwining snakes in his sleep and realized that this is what the structure of our DNA looks like;
– Scientists attribute this boost in brain activity and creativity to the fact that our brain is in the ideal state where you have this loose cognition and weird associations in this sleep phase;
– Our body temperature drops slightly in non-PEM sleep phase, and the brain uses less energy;
– During REM sleep, the brain does some check-ups;
– When you are awake, your brain receives signals from all senses—images from your eyes, sound from your ears, and so on. But when you sleep, all of these senses are basically shut off;
– Your body releases growth hormone precisely during the deep sleep phases. Animation is created by Bright Side.
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Modern technology never ceases to surprise us with creativity and things we could hardly imagine before. But when it comes to building robots, today’s scientists often draw on the natural world for inspiration – giving them millions of years of evolution to borrow from. There have been created numerous robots inspired by animals. Nature and technology got fused together and resulted in some amazing and advanced robots! Even cockroaches served as an inspiration for scientists in Berkeley. And not without reason: they’ve been around for 400 million years, they can run really fast, get into the tiniest hole and hold breath for a long time. This is how CRAM was created – it's a robot the size of your palm designed to do the same incredible things cockroaches do. Wanna take a look at it an 9 more robots inspired by animals? #brightside TIMESTAMPS
Cockroaches robots 00:34
Worm robot 02:14
The Bat Bot 03:26
SoFI fish 04:13
Cheetah Robot 05:16
Snake robot 06:23
Spider robot 07:20 —————————————————————————————-
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More 10 Amazing Animal-Inspired Robots That Actually Exist Videos

What did you wanna become when you were a child? How about some professions that're really out of this world? An air taxi driver, an asteroid miner or a space jeweler? What would your job be in space? Each of the planets out there has a different atmosphere and conditions. So there'd be some unique jobs you could pick on each of them. For example, there's a 'Diamond planet' that's twice as big and dense as the Earth and is covered with diamonds. So there'd definitely be need for space jewelers. While a dream job on Mars would be a ski instructor! Winter on the Red Planet lasts around six Earth months. What would you wanna become? #brightside TIMESTAMPS
Asteroid miner on Mars 00:00
Ski instructor on Mars 02:08
Europa 03:40
Space taxi on Venus 03:53
Space volcanologist 04:56
Moon finder 05:24
Space jeweler 06:42
Glass jeweler 07:36
Explorer on Planet9 08:05 SUMMARY
– Tens of thousands of asteroids are circling our Sun, and most of them are between the orbits of Jupiter and Mars. That way, Mars is a perfect location for an asteroid miner;
– Since the gravity on asteroids is so much weaker than on Earth, you'll have to learn how to use grapples to anchor yourself to the surface;
– Mars has 4 seasons, just like Earth, and winter there lasts around six Earth months because the year there is almost twice as long;
– The company will provide you with a flying car that looks like a mini spaceship on Venus;
– Venus is the planet with the most volcanoes in our solar system;
– All major planets have moons, except for Mercury and Venus. You'll have to visit these planets first and try to find their moon;
– 'Diamond planet' is 41 light-years away from the Earth, located in the Cancer constellation. It's twice as big and dense as the Earth, but almost 8 times more massive;
– There's a planet where it rains glass! It's located 63 light-years away from us, it's a little big bigger than Jupiter, and you'll be amazed by the planet's atmosphere;
– Our scientists think Planet 9 exists because they noticed gravitational force affecting a group of small objects with clustered orbits. Animation is created by Bright Side.
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More What Your Job Would Be Like on Different Planets Videos

We all know that our bodies are amazing and unique… but sometimes we just forget about this fact. But here's a reminder for you: you have a body of a superhero! If you doubt that, here's some proof: there's enough room for an entire chicken or a bottle of large cola in your stomach. Your liver acts as your own personal bodyguard, protecting you from toxins and other unwanted stuff. And, by the way, you can distinguish between more than a trillion smells! Need more proof that your body is absolutely amazing? Here's a lit of 31 true body facts that'll let you know your body better and inspire you to take care of it. You might not expect some of them to be true… but they are! #brightside TIMESTAMPS
Stomach capacity 00:00
Wisdom teeth 01:02
Belly button hair 01:21
Liver bodyguard 01:24
Nose at night 02:25
Distinguish smells 03:05
Brain shrinking 03:50
RAM 04:25
Humerus 05:48
Body fat 07:08
The fastest muscles 08:15
Double-jointed thumbs 08:30 Animation is created by Bright Side.
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More 31 Unique Human Body Facts Will Make You Feel Superhero Videos

Scientists never cease to surprise us with their inventions. Some of them look straight like from a sci-fi movie. But making these fantastic things is possible, they've already done it! Robotics exoskeletons that will make you 20 times stronger, a huge submarine that can stay underwater for 4 weeks. Or an ultra hot torch that slices through steel. Here're 17 cool things that prove the future has already arrived. Have you ever wanted to find yourself right inside a sci-fi video? Here's your chance! Advanced technology, innovations and futuristic objects – all of these things can't but amaze anyone! #brightside TIMESTAMPS
Sarcos Robotics Exoskeleton 00:00
Gravity Industries 01:40
Burner Metal Vapor Torch 02:36
Hoverboard 03:10
Model 118 ConvAirCar 03:56
A colony on Mars 05:20
MIGALOO M 5 06:19
Artificial eye 07:08
Nanobots 08:40 Preview photo credit: Yeovilton, Somerset/UK – July 13 2019: Gravity Industries Inventor and Ex-Royal Marines Reservist Richard Browning nicknamed the real-life Iron Man flies his 1000bhp jet suit at RNAS Yeovilton Airday: By Andrew Harker/Shutterstock.com, https://www.shutterstock.com/image-photo/yeovilton-somerset-uk-july-13-2019gravity-1566995143 Animation is created by Bright Side.
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More 17 Cool Inventions From Hollywood Movies, You Can Buy In One Click Videos

Can you imagine a flight attendant dancing or eating food designated for passengers? Sounds unreal, doesn't it? Well, if you've ever wondered what crew gets up to on empty flights, you're about to find out. The sky's the limit! You'll be surprised by how creative they might get when there's no need to act according to the protocol. There's a bonus waiting for you! You'll learn about a ghost-flight mystery. It happened in 1943, when a flight on a combat mission disappeared following a raid on Naples. What happened next surprised everyone… #brightside TIMESTAMPS
Ghost flight 00:00
Aisle surfing 00:34
Party time 01:20
Passengers food 01:53
Ghost Flight 1943 02:55
Turn-around 04:00
The attendants' job 05:00
Why to turn off phones 06:15
Taking off headphones 07:15 SUMMARY
– Their flight is a ghost flight. Devoid of passengers;
– They took a serving tray each but had no intention of preparing food and headed into two separate aisles. It's aisle surfing time!
– A crew member made a viral video while singing in the aisle of an empty plane;
– In Europe, airlines must fulfill their obligations and continue the flight, even if no passengers are on board. Similar legislation exists in America;
– In 1943, a flight on a combat mission disappeared following a raid on Naples. In Libya, the wreck was discovered, but not until fifteen years later. None of the crew was found;
– The more extended the plane sits on the tarmac, the less money the airline makes. They want the turn-around to be as short as possible;
– If you sit in the exit row, please don't put any luggage under the seat in front of you because it can block the way if the flight attendants, for example, need to use rubber slides urgently; Animation is created by Bright Side.
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More Flight Attendants Reveal What the Crew Does on an Empty Flight Videos