00:00The pyramids, they let you go. Look at the size of these things.
00:04It's not surprising that people play on extraterrestres who would have fallen a hand or a tentacle.
00:09It would be like the magic of the ancient chantier.
00:11But well, the indigenous peoples have also revealed real magicians of architecture.
00:16Before the sea or the grue, they built cities and made the marvels
00:20which deconcerted the engineers even today.
00:24And one of these exploits, it's when they transported a tronc d'arbre of 5 tons
00:28on more than 160 kilometers, just to dress it vertically.
00:33If we could move around 900 years back to the other side of Mississippi,
00:37where today is Saint Louis, in Missouri, we would assist to something magnificent.
00:42This is a land of a indigenous indigenous city called Kaokia.
00:46At the time, it was hundreds of thousands of inhabitants
00:49with places and large structures in bois for ceremonies and gatherings.
00:54It was the biggest city in the north of Mexico.
00:56In its center, there was Monk's Mound, a huge compact platform of water,
01:00which is higher than a building of 10 floors,
01:03entirely built by hand, with millions of panels of water and argile.
01:08So when we can do that, why do we stop there?
01:11The inhabitants of Kaokia have also built huge pots in wood
01:15which could be perhaps a solar calendar,
01:18a ritual or a symbol of spiritual connections.
01:23Certains were also high as modern houses.
01:25But it was not just a simple pot to plant,
01:27to impress.
01:29They were built in a massive massive circle
01:31that the archaeologists call today
01:32the Woodenj,
01:34a bit like the ancient observatories.
01:37In following the place where the sun was and couched,
01:39they could determine the days the long and the most long
01:42and the most short of the year.
01:42They also saw the two moments where the day and the night were egos.
01:46It was extremely useful to the cultivators
01:49to decide when to sow and when to sow.
01:51In addition, it allowed to keep their calendriers synchronized
01:54with the sun for their seasonings.
01:56Among these monuments, there was a very special one,
01:59a colossal tronc of cypress chauve,
02:02called the Mitchell Log.
02:05Contrairement to Woodenj,
02:06they didn't make any part of a circle or a calendrier.
02:08They were dressed alone,
02:10probably in the heart of the place of the ceremony.
02:13The archaeologists think they would serve
02:15as a symbol of power or spiritual power,
02:18a sort of obelisk in wood dominant the city.
02:21Some researchers suggest even
02:23that they would have represented a Axis Mundi,
02:26a sort of pillar of the world
02:28reliant everything in which the Chaochiens believed.
02:31For them, the universe was organized in couches.
02:34On top of it, the upper world,
02:36the sun, the moon,
02:37and the forces that govern the time and the seasons.
02:40On top of it, the upper world,
02:42an aquatic world of chaos,
02:44of spirit and transformation.
02:46Between the two, the world of the milieu.
02:48That's where we are,
02:49with the birds and the birds.
02:52Of the monument like the Mitchell Log
02:55marked perhaps the point of connection between these three worlds.
02:57A place where the spiritual power could circulate between them.
03:01That's what we think they believed.
03:04But what was its function?
03:06It's not that the most impressionant.
03:07The tronc weighed about 18 mètres long
03:10and weighed about 5 tons.
03:12It's about the weight of two pickups plain-tie,
03:15like the Ford F-150
03:16or the Chevrolet Silverado 1500.
03:19And even more surprising,
03:21this type of tree didn't even push close to Chaochiens.
03:23The scientists discovered that they came from more than 170 km south,
03:28transports without roues,
03:30without grues
03:30and without moteurs.
03:32So how did they do it?
03:34Well, to understand how it was only possible,
03:37we have to look at what tools and what knowledge
03:39the Chaochiens had really.
03:42We know that they had no chariot,
03:43no metal tools,
03:45no animals,
03:45like the chevaux or the bœufs
03:47to take a load of charge.
03:48All this didn't exist anymore in the North.
03:51And even with the strength of the team work,
03:53it remains the equivalent of two pickups,
03:55the kind of task which seems difficult
03:57even with the modern technology of today.
03:59And the first,
04:00even incredibly fascinating,
04:02is probably the least plausible.
04:04The theory is quite simple,
04:06they trained it by the way terrestrial.
04:08Imagine hundreds of people
04:09taking something too low
04:11through forests and marécages,
04:12pas-à-pas,
04:13on more than 160 km,
04:15with cords,
04:16wheels,
04:17and determination.
04:17They would have to open the streets,
04:19build a fortune,
04:21build a fortune,
04:21and find some astuces
04:22to keep the tronc in movement
04:23without breaking it.
04:25It seems impossible,
04:26but they would have to build
04:272,5 millions of blocks of stone
04:29to build the Great Pyramid too.
04:32And yet,
04:33humans did it too!
04:36The second theory is more pragmatic
04:38and asks a little creativity.
04:40They made it float on a river.
04:43The network of Mississippi is huge,
04:45with all the rivers and rivers
04:48reliant the marécages
04:49of Cyprès du Sud
04:50to the port of Kaokia.
04:52The Kaokians used probably
04:53already their roads
04:54for the commerce,
04:55so transport a tree
04:56by the water
04:57was nothing to do with it.
04:58They might have been floating
05:00the cyprès
05:00or put it on a radeau
05:01through the morts
05:02and the mountains
05:03of Mississippi.
05:04In creusant
05:05some small rondins
05:05to make a radeau
05:07or using
05:07the rosewoods
05:08to float
05:09they could maintain
05:10the tronc
05:11to float
05:11all the guided
05:12through the current
05:13with the perches
05:14and the cordes.
05:15Imagine the logistics!
05:17It's efficient
05:18and fluid
05:18because once
05:19the tronc
05:20to float
05:20it's the water
05:21almost all its weight.
05:24The small teams
05:25had no more
05:25to drive in the méandre
05:27with the perches
05:27and the cordes
05:29instead of
05:29the soulever
05:29on the track.
05:31It was a great planification
05:33and a great precision
05:34because
05:35the Mississippi
05:35was not exactly
05:36a long river
05:37with its bands
05:38of sable
05:39mouvant
05:39its obstacles
05:40and its power
05:41If they had chosen
05:43the wrong season
05:44or let the tronc
05:45be blocked
05:46against a rive
05:46it could never be lost.
05:48But wait
05:49how can the scientists
05:50know where he came
05:52and when he came
05:52and when he was couped?
05:54Rappelons
05:54that they affirm
05:55that this transport
05:56had been a year
05:56and this part
05:58is not a theory
05:59it's scientifically proven
06:00The researchers
06:01started with a test
06:03called
06:03analysis
06:04isotopic
06:05of the strontium
06:06The strontium
06:07is a natural
06:08element
06:08and the soil
06:09and each region
06:10has its own unique combination
06:12The trees absorb
06:14in growing
06:15this chemical signature
06:17in their bois
06:17In comparing
06:18the strontium
06:19of the Mitchell log
06:20to the modern
06:21of the region
06:22the team
06:23determined
06:23that they came from
06:24over 170 km
06:26south of Kaokia
06:27probably
06:28near the actual
06:29south of the Illinois
06:29or north of the Arkansas
06:32They also determined
06:33when the trees
06:34had been abashed
06:35They used the same
06:37method
06:37that for the fossiles
06:38the datation
06:39radiocarbon
06:39but with an interesting
06:41astuce
06:42Each year
06:42a tree forms a new
06:44anneal
06:44a little like a line
06:45on a calendar
06:47A year
06:48a huge amount of energy
06:50came from the sun
06:51When this rayon
06:52has reached the earth
06:53it has slightly
06:54changed the atmosphere
06:55and the plants
06:56everywhere
06:56the trees
06:57are living
06:58at this time
06:58have recorded
06:59this change
07:00in one of their anneals
07:01Today
07:02scientists
07:03see this particular anneal
07:04and say
07:05that's it
07:06it's formed
07:07during a solar storm
07:07that we already know
07:08already
07:08this peak
07:11works like
07:12a neurodata
07:13In counting
07:14the anneals
07:14which were formed
07:15after
07:15we can determine
07:16exactly
07:17when the tree
07:18and it was in 1124
07:22And it's not the first time
07:23that researchers
07:24use this technique
07:25the same type
07:26of rayon cosmic
07:27has been found
07:28in the world
07:28all
07:30In Japan
07:31it allowed to date
07:32a ancient cedre
07:32which had recorded
07:33a solar storm
07:34in 774
07:36of our era
07:37In Europe
07:38the north-west
07:39we used it
07:39to determine
07:40when the Vikings
07:41were built
07:42In Terre-Neuve
07:43it allowed to prove
07:44that the Vikings
07:46had reached
07:47the North
07:47through 1021
07:48with a peak
07:49of rayon cosmic
07:50found in the wood
07:52When we see
07:53a genius
07:54in architecture
07:55we suppose
07:55in general
07:56that it comes
07:56advanced
07:57and complex
07:58and it's true
08:00but here
08:01the technology
08:01was more simple
08:02and the maths
08:03more practical
08:04The Kaokiens
08:05had not needed
08:06any motors
08:07nor planes
08:07they used
08:08what they had
08:09and knew
08:10to serve
08:11If it's true
08:12that they had
08:13accomplished
08:13this incredible
08:13incredible
08:14through the water
08:15it means
08:16they had to
08:16control the rivers
08:17like the Egyptians
08:18had to control the desert
08:20they had to work with the nature
08:21rather than
08:22they
08:23or
08:23maybe you prefer
08:24the first theory
08:25hundreds of
08:26hundreds of
08:26robust
08:26who are
08:27in the jungle
08:28and thank you
08:31and thank you
08:31for watching
08:33and thank you
08:33for watching
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