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00:04you know how Stephen Hawking said the best evidence we have that time travel is not possible
00:09and never will be is that we have not been invaded by hordes of tourists from the future
00:16but what if these tourists come to our time but they do it secretly
00:21you may even have met one of them let's see the most famous time travelers
00:30meet Orin he's a cyborg who came to us from the year 2050 to stop the coming end of the
00:36world
00:36in 2020 he appeared on a tv show where he said the whole world was inside the matrix
00:43then he hit the headlines and gave an interview to a popular youtube channel
00:48as proof that he's a cyborg he demonstrated his robotic voice
00:52which can be made in a simple computer program
00:56he also called himself we because he declared himself a collective consciousness that had come
01:03to save humanity
01:06Orin became famous for his predictions about the near future but it turned out that many experts
01:12had already announced these forecasts earlier he also said that a huge corporation was suppressing
01:18humanity and we were inside a complex computer simulation if we don't improve or care for each
01:24other and nature the end will begin in 2050. Orin no longer appears on major shows
01:30but he has a small fan base of people who love all sorts of fantastic theories
01:39another time traveler is adam archon who came to us from 2045. there was an interview with him on
01:46youtube where he shared some details about the future of the us after which the video went viral
01:52and hit the lines in many newspapers archon reported that the last official president of the country
02:00would be the daughter of martin luther king the third and she would become the greatest u.s president in
02:08history another exciting event that archon announced is supposed to happen in 2028 he said that people
02:15would learn about the existence of extraterrestrial civilizations he added that these creatures wouldn't
02:22come from outer space the traveler also noted that the world would switch to a single digital currency
02:27and all cash would disappear of course no one believed him so the experts conducted a lie detector test
02:36and adam archon successfully passed it he said that he had a chip in his hand to facilitate time
02:42travel an extraterrestrial civilization would arrive on earth in 2028 and in 2045 people would be closer
02:50to robots the lie detector didn't state that archon was lying but this doesn't mean he told the truth
02:58since the device can be deceived with the help of special training in any case in 2028 we will find
03:05out whether archon was right or not
03:10all these time travelers arrive in the past and for some reason don't use knowledge from the future
03:17what would you do if you could go back 50 years perhaps you would invest money in shares of some
03:23young company that will become a big expensive corporation in that case everyone would believe
03:29that you really came from the past and by the way one guy did it he invested 800 in the
03:35stock exchange
03:36and made 350 million dollars out of it this guy's name was andrew carlson and he hit a big jackpot
03:45in 2003
03:47however he didn't manage to enjoy a rich life because the fbi came for him andrew sold some stocks and
03:54bought others and did this very successfully thus in a few months he became a millionaire
04:01the securities commission couldn't believe in such coincidences so it called the fbi
04:08during the interrogation everyone was sure andrew would begin to justify himself and say
04:14he was lucky but instead he calmly replied that he came from the year 2256 with the help of a
04:21time machine
04:23of course no one took it seriously but when the fbi started looking for information about this man
04:30they found nothing andrew carlson had no documents he was not in any database he just appeared out of
04:38nowhere and started making a lot of money he was interrogated for about four hours and he behaved pretty
04:45calmly it seemed as if he was telling the truth however he didn't tell them the time machine's location
04:53when the press found out about this man he immediately became a celebrity well-known news
04:59sites began to write about andrew carlson articles have appeared in japan australia germany the uk and
05:06other countries and of course journalists started calling the fbi to find out more details about this guy
05:13and the fbi told them that the whole story was fiction and that there was no andrew carlson
05:19information about him appeared on an internet resource known for its fake news at some point
05:25the article about the time traveler somehow got into yahoo where it went viral so as we see
05:32all statements about time travelers are either fiction or a lie conversations about such travels appeared
05:40thanks to fantastic films and books pop culture has greatly influenced this fantastic concept and
05:48created several theories claiming that time travel is real and some people believe that especially
05:54those who are far from science but what do real scientists think about this are such trips really
06:00possible let's try to find out scientists say yes time travel is real because we're now traveling in time
06:10time is moving forward and we're moving with it we call it a journey but if we need to get
06:16into the future
06:17or go back to the past everything is much more complicated here remember einstein's little theory
06:24of relativity it says that time moves relative to the observer and has no constant value to understand
06:31better here's a simple example 10 hairs on your head is it a lot or a little 10 hairs in
06:39a bowl of soup
06:40is that a lot or a little everything is relative and depends on the conditions
06:46the same thing happens with time and space if we move at a tremendous speed close to the speed of
06:53light
06:53then time slows down for us the perception of time becomes different for a person who's running
07:00and for one who's standing still if we're near some heavy object let's say a thousand times heavier than
07:06the sun then the time next to this object also slows down thanks to its strong gravity
07:14in this sense time travel is possible if you're an old person and meet your friend as young as he
07:20was
07:2050 years ago why are you so young oh i've been flying in space at a tremendous speed all this
07:27time that's all
07:29but this doesn't mean that this friend just sat on the ship for 50 years and didn't age
07:35no time was different for him 10 years for you on earth is a long period of time but for
07:41him these 10
07:42years passed like half an hour gravity and speed bend time for this reason astronaut scott kelly who spent
07:51a year and a half in orbit became five milliseconds younger than his twin brother after coming to earth
07:58all this time scott spent inside the ship flying in orbit at high speed and he was also further away
08:05from the gravitational center of the planet so time was slower for him by five milliseconds than for his
08:11brother objectively time always runs at the same speed but its speed changes inside the perceptions of
08:19different observers under different conditions that's what the theory of relativity is about
08:25but what about jumping into the future or the past like in movies wormholes will help you with this this
08:32is something like tunnels that pass through space and time and can connect different time segments in
08:38different places in the universe they are like cheat codes that can break the laws of the universe wormholes
08:44are elusive have different sizes are unpredictable appear in space and vanish but their main problem
08:52is that wormholes only exist in theory and sci-fi and have never been noticed in our universe by scientists
08:59airports are some of the most visited and at the same time mysterious places out there
09:04so let's see what's going on behind the scenes and what secrets airports hide
09:10at some airports there are special people called profilers such people bring to life a special program called
09:17spot screening passengers by observation technique they analyze your mimics gestures and behavior
09:25in order to detect suspicious people their job is to notice non-verbal signs of anxiety people licking their lips
09:33itching or looking around a lot if a profiler notices a person acting in an unusual way
09:39they can invite them for an inspection
09:42there they talk to this person trying to find out more about them and confirm or not their suspicions
09:49airport agents might also be watching you all the way from the security check to your gate
09:55some airports have facial recognition scanners that can easily track you
09:59they're equipped with special software that compares passengers faces with their ids
10:05keep in mind that if you don't charge your laptop before the flight it may be confiscated
10:11it's not uncommon for an airport security officer to ask you to power your device up
10:17if you fail to do it your gadget can be taken away for an additional check
10:22for safety reasons it's crucial to make sure that it hasn't been tampered with
10:26or modified in a way that can cause harm during the flight
10:30packing an electric brush in your check-in luggage may land you in trouble
10:35brushes produced by some brands have lithium batteries inside and those can potentially lead
10:41to serious problems in the air that's why leaving your electric brush in your check suitcase
10:46isn't an option but you're allowed to store them in your carry-on bag at the same time
10:52if your device runs on double-a batteries you can put it wherever you want anyone who's ever traveled
10:59by plane knows about the no liquids rule but not everybody knows that this rule also applies to
11:05peanut butter toothpaste creams lotions liquid makeup lava lamps snow globes some kinds of medications
11:13deodorant and even gel shoe inserts now let's go outside for a while and look at those landing spots
11:22airports charge airline companies huge fees for landing on their runways on certain days and at
11:28particular times but the most interesting thing is that the landing spots can be bought and sold for
11:35example in 2016 oman air paid air france around 75 million dollars for one early morning arrival slot
11:43at london heathrow airport you must have noticed that airfare has increased over the past decade that's
11:50because of the extremely high prices of landing slots dispatchers don't only control the planes in
11:57the sky as you can often see in the movies but they also look after their movements on the ground
12:02they
12:03also control the lighting on the runways there's three types of air traffic controllers en route
12:09terminal and tower each of these dispatchers has their own area of responsibility one dispatcher has
12:17about five monitors and the information on them is constantly changing since the monitors show weather
12:23conditions and information about other planes you know how it sometimes goes you come to a security
12:29checkpoint and all of a sudden it turns out you have something prohibited in your carry-on
12:35but worry not you still have a chance to save your favorite pen knife
12:39at some airports there are on-site postal services and you might have an opportunity to mail your
12:46belongings to any address you provide but the mailing fees are pretty high plus certain items are
12:53prohibited and the postal service won't deliver them airports can be selling your lost luggage right now
12:59of course i don't say that there's no chance for you to get back your suitcases that traveled to a
13:04different destination but just as likely you might not see it again in this case an airport
13:11has the right to sell your misplaced belongings at an auction most airports have an annual lost
13:17luggage sale after paying an entry fee you can bid on electronics clothes bags and other stuff
13:25while flying you might have a celebrity on board but you won't know it large airports have separate
13:31check-in and security procedures for celebrities they often board the plane directly through a hidden
13:37door located beside the jet bridge some airlines also use cool cars to transfer vip passengers from
13:45the terminal building to the plane at the same time most people come to the airport well ahead of time
13:52and the most popular activity while waiting for a flight is wandering through the duty-free zone
13:58and even though people rarely plan to buy anything there different products end up in their shopping
14:04baskets that's because lots of airports are designed in a special way that makes people feel relaxed and
14:11at ease i'm talking about all those huge windows a lot of light massage chairs and comfortable seating areas
14:20and statistically calm passengers are 10 more likely to spend money on retail duty-free and food
14:27designers put a lot of thought into airport layouts it helps to ensure the smooth flow of travelers
14:34and the main point here is easy navigation that can prevent people from getting lost
14:40this is achieved through subtle but very effective design cues and placing duty-free zones between security
14:48checkpoints and boarding gates is one of them they supposedly help you relax after clearing security and
14:54and lead you where you need to go but speaking of food a celebrity chef restaurant at the airport
15:00might not be as good as it would be if you were visiting the real thing
15:04not chefs themselves but special restaurant companies are responsible for airport outlets
15:10one of the reasons is the extremely strict security that surrounds airport deliveries including food
15:16you may still have a nice meal but it won't be the same now i'll tell you about one more
15:23way airports
15:24manipulate you into spending your money they make you walk through the shiny duty-free stores straight after
15:30the security check but the most curious thing is that the walkway through such stores usually veers to the left
15:37that's done because most people are right-handed which means they use their right arm to pull their luggage
15:43and are more likely to look to the right while passing through the stores
15:47and the duty-free zone veering to the left leaves more space on the right where passengers are more likely
15:53to look
15:55oh and have you ever noticed how many mirrors there are at airports
15:59mirrors are strategically placed there to make airports appear larger and create an illusion of more space
16:06this in turn helps to reduce the feeling of claustrophobia and makes the airport experience more comfortable for travelers
16:13if you have an opportunity don't exchange cash at the airport you'll never get a good rate there
16:20those who didn't buy local currency in advance can instead order it online and collect it at the airport
16:27some services only need a few hours notice for such an order or it might even be better to use
16:33an
16:33atm to withdraw some cash at your final destination now have you ever paid attention to airport codes
16:41the most often used are three letter codes why this number back in the 1930s in the usa pilots used
16:49the
16:49national weather services two-letter city codes to refer to airports but soon the number of airports in
16:56the country outgrew the number of such codes that's why airlines expanded this system by adding the third
17:03letter it was usually x that's how la los angeles turned into lax but even though there shouldn't be
17:11two airports with the same code some of these codes sound so similar you could easily mistake one for
17:17the other for example look at this airport with the code cgp in bangladesh and here we have cpg it's
17:26the
17:26code of an airport in argentina it's dangerously easy to fly to the wrong place so pay attention
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