Voici une vidéo sur un sujet inhabituel.
Imaginons que tous les terriens disparaissent soudainement de notre planète.
Peu importe la cause qui n'est pas le sujet de cette vidéo.
Quel en sera le résultat ?
Les images nous transportent dans monde cauchemardesque dans lequel les rares survivants retombent à l'âge de pierre.
Et si la Terre avait déjà connu ce type de destruction il y a des milliers d'années ?
D'après Scott Waring
"Human beings have been spreading across earth for thousands of years. It is believed that we originated from Southern Africa around 200,000 years ago and Around 130,000 years later we migrated out of Africa and colonised pretty much the entire planet. Within these tremendous years humans have used and destroyed parts of the earth for our own benefit.
We have invented all sorts of things to improve our own quality of life and have only recently started to worry about what our actions mean for our home planet. But what if our time is nearly up? What if the human species was wiped out, or maybe we drained the resources we use to survive and just upped and left? What would the earth be like without humans. Well it is said that one of the first things to happen if humans disappeared would be very destructive. Man kind has built 437 nuclear power plants around the world and if we left, the generators that circulate cold water around the reactors would lose power. This could lead to over heating and melt down, causing hundreds of radio active areas. Some of the air, rivers and oceans close to the reactors would be polluted with radiation for many years. But in the other areas of the world, Mother Nature would start to recover, trees and plants would be allowed to grow freely and certain animals would thrive. General livestock would struggle without human aid, and most would likely become prey for other animals. But other more wild animals become free to wander the abandoned streets of our city's and towns. Even domesticated animals would have to rediscover their wild ways.
Monuments like the Eiffel Tower that are made of steel would start to rust and the roads would become rubble and overgrown with weeds. Many buildings would start to fall apart.
Books, photographs, electronic data would fade away, leaving little evidence that we ever existed.The natural world would take back its land. Some more hard wearing structures would likely survive over many years, maybe even some of the ancient structures would out last our modern buildings and look as if they were the last civilisation on earth. But it is still believed that even after thousands and thousands of human free years, you would still be able to find many objects that we had left behind in our legacy.
From plastic shopping bags to frames of airplanes or even some buildings. Maybe after millions of years even a new species of animal would become dominate and evolved in to a Homo sapiens like creature. Some scientists believe that pretty much any vertebrate land animal could evolve intelligence, provided it finds the right environmental challenges that favor strategic thinking. Obviously this would not happen overnight, but it is still a possibility that with the right amount of time an animal could evolve a complex brain like our own. This would take millions of years without the presence of humans to happen, but if we can still find traces of the dinosaurs from 65 million years ago, surely parts of the human race would still exist to be discovered.
I suppose we will never really know what will truly happen unless we left and monitored the planet. But when you look around in your day to day life and see how we have changed and shaped the planet. You do have to wonder if mother nature could ever wipe the evidence of man kind away completely. "
La vidéo
Transcription de la vidéo
0:00today we are presenting you a video on an unusual topic imagine that all people
0:05suddenly disappeared from the planet
0:08the reason is irrelevant just imagine the results now we're going to tell you
0:12what is going to happen after we are gone
0:14several hours after humanity disappears lights all around the world will start
0:22to shut down since most power stations work on fossil fuel without people there
0:27won't be anybody to charge them so they will stop 48 hours after registering a
0:31sudden drop in energy consumption nuclear power plants will switch to
0:36safety mode when mills will keep working until the lubricant runs out
0:40solar panels will also eventually become useless just dust deposits nearly every
0:45region except the ones supplied by hydroelectric power stations will have
0:49that power cuts off on the west of the United States the generators of Hoover
0:54Dam erected by the by the water flow from Lake made it can be left unattended
0:58for several months or even years two or three days after we vanish from the
1:03planet's most metros in the world is going to be flooded because the pumps to
1:07protect them from the underground waters won't work without people after 10 days
1:12that's locked up I'm will start dying of starvation and dehydration millions of
1:17chickens in millions of cows as well as other farm animals will be dead there's
1:21a managed to make their way out will enter a ruthless fight for survival in
1:25the brutal world of real wildlife there won't be a nation decorative cats and
1:29dog breeds and they will be the first to die out
1:32Bulldog short legs and Tariah small jewels again to become the main and
1:37quite likely deadly disadvantages a few weeks lights there won't be any small
1:42dog breeds left anymore
1:43big dogs will gather in practice and hunt down small of rates as well as
1:47other end
1:48Milles about a month often disappear all cooling water on nuclear power stations
1:53will have evaporated this will lead to a series of explosions much stronger than
1:57the Fukushima and Chernobyl disaster as millions of animals will die of cancer
2:02but overall the planet will recover from the radioactive contamination rather
2:06fast and easily one year after people disappear strange stars will start to
2:11fall from the sky during a space history which took dozens of thousands of
2:16objects to the sohbet the highest satellites will fall off too many years
2:20after 25 years three courses all squares and sidewalks will be covered with
2:26vegetation whether appliance there are herbivorous animals and weather is pray
2:31there was always a predator the surviving dogs will cross with the
2:34wolves that come to the former cities without sauce the air will become much
2:38cleaner in some cities the visibility range will become several times longer
2:43cities like Dubai in Las Vegas will be buried in sand the desert will take what
2:48belongs to it so well all of nature after 300 years metal construction such
2:53as the Eiffel Tower or steel bridges will start to break since all these
2:57years there won't be anybody around to painting protected from corrosion steel
3:01rods in concrete will blow it up to three times of their initial thickness
3:05and the last 20 buildings will go down
3:08swamps which formerly occupied America will reappear and hundreds of bird and
3:13animal species will return to that unfairly taken home large marine animals
3:19will also be very glad not to see us in the absence of humans Wales will thrive
3:23and reproduce to the max move the oceans capacity to face them this is how modern
3:28cities will look after 500 years without papal up to 10,000 years the only
3:33reminiscence the people we're here someday will be the remains of a few
3:37stone constructions among which the pyramids in Egypt and the Great Wall of
3:41China Mount Rushmore National Memorial will be that almost intact for several
3:46hundreds of thousands of years in fifty million
3:50years plastic bottles and pieces of broken glass will be the last traces of
3:54our civilization in another fifty million years they will be gone as well
3:58as you can see how planets is quite study and can get rid of all about trash
4:03if after three hundred million years old later they will be a new rationale
4:07species they might not even notice that was a civilization so our planet can
4:13perfectly do without us but we can't without her sights the planet thanks for
4:20watching please like and share the video in social networks and we'll be right
4:24back to you as fast as we can
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