00:00It could be that your hair could travel in the time.
00:03Let me explain.
00:04They will not use a machine to go up the time
00:06and return in the years 1800
00:08to talk to your grandparents.
00:10But everyone will make the sad experience
00:13of discovering a hair blonde hair
00:15in saying,
00:16I vielli,
00:17but listen,
00:18scientists have good news to you.
00:21They may have found a way to reverse the process
00:24and to give color to your beautiful hair,
00:26at least for a certain time.
00:27In a study datant from the 1970s,
00:30it was a question of a man
00:31who had three hair clairs to the point
00:33and more foncés près of the hair chevelu.
00:35It seemed to imply that the usual process
00:37of grisonnement of the hair,
00:39which begins at the root,
00:41had in his case done things at the same time.
00:44Today, a new study
00:45will bring us even more solid evidence
00:48of this phenomenon.
00:49Some specialists have examined
00:51the hair of several people
00:52of age and different places.
00:54What they discovered
00:55may seem a little surprising.
00:56It would seem that our hair
00:58would be linked to our stress level.
01:01The way we feel psychologically
01:03could reflect on our head.
01:05This new approach
01:06suggests that there could be a lapse
01:08of time during which
01:10the process of grisonnement
01:11could be reversed.
01:13A few years ago,
01:15an expert at the University of Columbia
01:17asked about the process of aging.
01:19He thought that,
01:21as some parts of our body
01:23grew before others,
01:24our hair will not become
01:26all gray at the same time.
01:27Maybe the hair
01:28that blanchise in the first
01:29are in a sort
01:30the weak ones of the chain.
01:32In discussing
01:33with his colleague,
01:34he had a click.
01:35If he could find a
01:36half gray hair
01:38and determine
01:38his speed of growth,
01:40he could know
01:40when he had begun
01:42to lose his color.
01:43By chance,
01:44his colleague found
01:45a hair on his head
01:46on his head
01:46and their project began.
01:48They soon found
01:49about 14 people,
01:51young people
01:51and less young people,
01:53with such a mèche
01:54of bicolor hair.
01:55He looked at the point
01:56a method
01:57to observe
01:58the minuscule changements
01:59of color
02:00of his hair.
02:01The results
02:02were stupéfiant.
02:03Some gris
02:04found their color
02:05origin
02:06and not only
02:07on the head,
02:07on the forehead
02:08as well.
02:11Today,
02:12we usually see
02:12that the gray hair
02:14appears
02:15towards the 30th.
02:16Well,
02:17scientists think
02:18that it is the best
02:19time to expect
02:20an inversion.
02:21And even
02:22if your head
02:22is full of gray hair,
02:23some of them
02:25could still change.
02:27This study
02:27has been proved
02:28promising
02:28by experts
02:30from different fields.
02:31They think
02:32that it could show
02:33how the changes
02:34related to the age
02:35in our body
02:36can be reversed.
02:37Of course,
02:38it is now only
02:39that hair,
02:40but who knows?
02:41One day,
02:41perhaps,
02:42we will reverse
02:43the signs of aging
02:43of our muscles
02:44or our muscles.
02:46This research
02:46does not limit
02:47the color of hair.
02:49These scientists
02:50wanted to know
02:51if the stress
02:51played a role
02:52in the gray hair.
02:54All the world
02:55has heard
02:55talk about people
02:56whose hair
02:57will change
02:57from the day
02:58to the day
02:59when they are confronted
03:00to traumatic events.
03:02The researchers
03:03asked the participants
03:04to tell their
03:05most stressful moments
03:06on a period
03:07of a year.
03:08In associating
03:09these events
03:10to the color of hair,
03:11they noticed
03:12that the great moments
03:13of stress
03:14correspond well
03:15to changes
03:16the coloration
03:17capillaire.
03:18For example,
03:19the hair of a man
03:20had begun to repose
03:21their colors
03:22during the rest of the
03:24while a woman
03:25had a gray mèche
03:26which correspond
03:26to a very difficult period
03:28of her life.
03:30Of course,
03:31scientists from all sides
03:32have made an apology
03:33of his work,
03:34but they did not have
03:35to remind us
03:36that this project
03:36was not at its beginning.
03:37Other studies
03:38must be carried out
03:39so that we can fully
03:40take part
03:41of these results.
03:42What is the next step?
03:44The researchers
03:45want to now
03:46to deepen the link
03:47between the stress
03:48and the gray hair.
03:49They hope to follow
03:50people in the time
03:51to see how their hair
03:52and their levels
03:53of stress evolve.
03:54Some think
03:55that in the future,
03:56our hair could be
03:57a window
03:58on our past experiences.
04:00Like the trees
04:01have the cernes
04:01which indicate their age,
04:03our hair could contain
04:04secrets
04:05on the events
04:06of our lives.
04:07But stress or not,
04:08what is the process
04:09at the origin
04:09of the hair hair
04:10of our hair?
04:11First of all,
04:12let's attack us
04:13to a répanded myth.
04:14It is apparent
04:15that the hair hair
04:15does not become really gray.
04:17They are simply
04:18their color.
04:19Once your hair
04:20has taken a certain color,
04:22whether it is brown,
04:23white, brown,
04:25brown or even brown,
04:26they keep this nuance
04:27all their lives
04:28unless you decide
04:29to give them
04:30a new color
04:31with a texture.
04:32With the age,
04:33our hair
04:33loses a little memory
04:34and produces
04:35fewer colors.
04:37Thus,
04:37after a certain
04:38number of anniversaries,
04:39when our hair hair
04:41falls,
04:41there are more chances
04:44that they are gris.
04:45If you ask
04:46when you see your first
04:47gray hair hair,
04:48consult your family albums.
04:50Your gênes,
04:51transmis
04:51by your ancestors,
04:53decide generally
04:54the moment opportun.
04:57By the way,
04:58why have we more
04:59more hair hair
04:59on the head
05:00that on the skin,
05:00on the rest of the body?
05:02First,
05:03why most animals
05:05have a furrure?
05:05It turns out
05:07that if they have a
05:08pelage,
05:09it is to feel
05:10well when the temperatures
05:11fall,
05:12and also to protect
05:14from the sun's rays.
05:16In this case,
05:17why did our ancestors
05:18have lost
05:19the biggest part
05:20of their furrure?
05:21Because they have
05:22proven
05:22creativity.
05:24They have found
05:25new ways
05:26to stay
05:27and to protect themselves,
05:29by using the fire,
05:30by building
05:31and cleaning.
05:32However,
05:34it is not because
05:34they could survive
05:35without pelage
05:36that they have
05:37lost all their hair
05:37like by magic.
05:38They have to have
05:39a good reason
05:40to become a verb.
05:41There are many theories
05:43on this subject.
05:44One of them
05:45suggests that
05:46it could have been
05:46too hot for us
05:47at a moment.
05:48Another indicates
05:49that some of our ancestors
05:51had spent a lot
05:52of time in the water.
05:53The fact of having
05:54so many hair
05:54on the whole body
05:55could have
05:56Of course,
05:58scientists
05:58haven't found
05:59the exact reason.
06:02So,
06:03what are the hair
06:04on our heads?
06:05Why are they still there?
06:06The explanation is very simple.
06:09The humans have evolved
06:10to walk on their two feet.
06:11That means
06:12that our heads
06:13are become a bit
06:13like a sol
06:15always turning towards the sun.
06:17Or,
06:17we know
06:18that the sun can be
06:19very intense,
06:20especially in some regions
06:21of our planet.
06:22So,
06:23our hair
06:23serves as an integral
06:25But this is not all.
06:26Our head
06:27even if it is not
06:28very big
06:29compared to the rest
06:30of our body
06:30is very busy.
06:32As she is always active,
06:34she creates
06:34heat.
06:35And our hair
06:35prevents this heat
06:37from falling
06:37like a natural
06:38integrated.
06:39Whether it is green
06:41or not,
06:41our hair hair
06:42will become more useful
06:44to the future.
06:44You ask?
06:45Every time
06:46you go to the coiffure,
06:48where are all these hair?
06:49For the moment,
06:50they are thrown.
06:51Fortunately,
06:52the engineers
06:52of Queensland
06:53have had an incredible idea.
06:56Instead of considering
06:57the hair
06:57as a waste,
06:58they saw a source
06:59of potential energy.
07:01They have burned
07:01gently the hair
07:02and they have extracted
07:03the carbon
07:04that they have transformed
07:05into minuscules grains
07:06like the ice cream
07:08of magic magic.
07:09Because it was really
07:10magic.
07:11They have
07:11painted the solar panels
07:12of this powder.
07:14And the panels
07:14made it better
07:15and to be more stable.
07:19Your hair
07:20also contains a pigment
07:21called melanin.
07:23I will show you
07:24the complicated details
07:25but this chemical substance
07:27is sensitive
07:28to the light.
07:29In discovering
07:30this phenomenon,
07:31a teenager
07:32has asked
07:33to say
07:33why not use
07:35the hair
07:35instead of the silicium
07:37in the solar panels?
07:39Imagine that you do exactly
07:40that.
07:41You give a large number
07:43of people
07:44the possibility
07:45of using
07:46hydropony
07:46of the energy
07:46to be less expensive.
07:48This could be
07:49the next step
07:50to make the solar energy
07:52more accessible
07:53and more affordable.
07:55Then imagine
07:56this.
07:56You are trying to
07:57grignote a delicious
07:58salad for breakfast.
08:00You never thought
08:01that hair could help
08:02to make
08:02the light?
08:03With the scientists
08:05of the University of Singapore,
08:06this could soon
08:07become a reality.
08:09They put a point
08:10a way to cultivate
08:11plants,
08:12particularly in cities
08:13by using
08:14a method called
08:15hydropony.
08:16Plus besoin
08:16de terre.
08:19Instead of that,
08:20they use a special
08:21combination
08:22of hair.
08:23Let's talk about
08:24the process.
08:24The researchers
08:25have collected
08:26hair in places
08:27such as
08:28as the coiffure
08:29and have extracted
08:30a substance called
08:31kératine.
08:32They then mixed
08:33this kératine
08:34to the cellulose
08:35which made
08:36more resistant.
08:38Once
08:38it,
08:38this combination
08:40turns into
08:41meat
08:42perfect
08:42to push
08:43plants.
08:44They chose
08:45to experiment
08:46with micro-pouces
08:48and with
08:48delicious vegetables
08:49like the choux
08:50and the rocket.
08:51Well, that's enough.
08:53I'm going to prepare
08:54a little salad.
08:55trouble.
08:55a little
08:55bad.
08:56So
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