How A Once Lush Green Sahara Became One Of The Biggest Deserts On Earth | How The Universe Works

[@tgee7485]

it gets me wondering, if any planets we know of now which are too cold to inhabit could be in the middle of an ice age, and life was once there..

[@Freemasons1732]

Mars. I dont think it will make a comeback like earth does, but Mars was allot like earth. Running rivers and oceans. Maybe life too. I guess that wasnt your question though, but still interesting. Edit: Also it "should" happen again. It has been happening for around 1 million years. We are actually over due for our next total freeze.

[@FreeSpeechXtremist]

Mars and Venus maybe had life and possibly still have life microscopic extremophiles but none of those planets are anywhere near as friendly as a snowball earth.

[@D3DSOL]

@@Freemasons1732cap

[@brah9961]

@@Freemasons1732eh?👀 we’re OVERDUE?? Bro what

[@isaacchirgwin5943]

There were like 3 to 4 references to the US on a video about the Sahara desert

[@jondon8941]

So what?

[@isaacchirgwin5943]

@@jondon8941 don't know about you but when I see a video talking about the Sahara desert I would expect it to actually talk about it rather than sideline it to constantly mention the US.

[@ahmadsamir1031]

@@jondon8941 found the fat one

[@blkhistorydecoded]

The whole explanation is full of crap, so I'm not surprised.

[@robinsss]

i disagree with the theory in the video'' most geographers say that the Sahara is a rain shadow desert i agree the Atlas mountains are blocking the rain clouds

[@011azr]

Everytime I watch this kind of videos, I realize how fragile we are as humans. Like, just a tiny change in universe scale can cause a really huge disaster that might threaten our ability to survive as a species

[@chukwumaolisehemekaouwarre3236]

Kalahari desert kzbin.info/www/bejne/honNZH-ceb59gq8

[@jordanjohnson9866]

Nah. Not just a tiny change. /

[@d1ssolv3r]

Makes you realize how wild it is that we're actually here for so long too.

[@moshemezrahi1592]

Could be Neptune

[@kekememe1457]

I thought I was just messing around with my DnD campaign being a desert that used to be a jungle-like, enchanted forest, glad to know I'm not just bsing my way through it completely.

[@meneither3834]

In the case of the Sahara it wasn't much of a jungle and more a Savannah with periodic rains.

[@pulsar22]

@@meneither3834 Sahara was a jungle. At least parts of it were. Sahara is too big to just be one micro climate.

[@meneither3834]

@@pulsar22 It would be mostly tropical wet&dry with pockets of semi-arid and remaning arid deserts. Not enough water for a wet jungle is my point. At best it would have similar dry jungles as Mexico has.

[@robinsss]

​@@pulsar22 i disagree with the theory in the video'' most geographers say that the Sahara is a rain shadow desert i agree the Atlas mountains are blocking the rain clouds

[@CuriouslyWatching]

Puts into perspective how little control, we as humans really have

[@solarkiddoo]

This is the best science channel for curious individuals like me :>

[@bryal7811]

Check out PBS eons / spacetime as well

[@solarkiddoo]

I already know that... But thanks :>

[@alexismisse9977]

Si 7k kkkkkkkkk

[@alexismisse9977]

Kk

[@alexismisse9977]

Kkkkk

[@PankajDoharey]

Where did all the trees go?

[@rikitourangi815]

I was asking about Egypt and if it was once green but instead got experts talking about icebergs and sahara😮

[@elhombre5291]

It will be green again one day

[@sciencestuffs8978]

It would be amazing if the desertification of the Sahara could be reversed through engineering

[@RajeevTiwariR]

It may be but there can be other consequences i.e. triggering of the ice age or another weather behavior that causes earth equally hard to live as it was in the ice age or earth as shooting gallery time.

[@Siddhartha040107]

It will be green again once the earth's axis is back where the sahara can receive rain again

[@idiotburns]

global warming you mean?

[@idiotburns]

gosh scientists are just people, not any smarter than any other, seen here

[@tomtripp5417]

What do you think the implications would be? Like what be the consequences?

[@fairwitness7473]

I love this series. I love the visual definition. I often sleep to this channel. The information is comforting.

[@GoEvenHarder]

The more you learn about our planet and universe, there more you noticed how unique were the odds to us be alive here, just like in the Bible

[@stein1385]

"The more we learn the less we know"

[@mrdavis3298]

Careful. KZbin doesnt like the B word....

[@pulsar22]

The more I learn, the more I see how the galaxies and the stars would be teeming with life. Life is so ubiquitous in our planet colonizing even the most inhospitable places that the odds of life sprouting elsewhere in the universe precedes us and will sprout also in some future systems 100%.

[@inlonging]

@@pulsar22 I always find that life being so ubiquitous, literally anywhere you are, there is life, makes space travel such a stark contrast in that there has been no life found anywhere yet!

[@sweetbelzn]

I enjoyed this dive. Great video, as always

[@elforeigner3260]

And you can be sure it will turn green again in the future. Earth climate is an endless ever changing process, we’re just witnesses of a few seconds of this planetary cycle

[@WilliamTheUnkownShoutout]

This is indeed great history about the dessert😀.

[@weijiet1665]

Is it delicious? LMFAO

[@spongebobsquarepants8403]

Needs a little moisture, it's dry

[@WilliamTheUnkownShoutout]

@@weijiet1665 my friend yes I think it is😀.

[@WilliamTheUnkownShoutout]

@@spongebobsquarepants8403 my friend yes it does indeed need some moisture😀.

[@gauravshah4857]

@@WilliamTheUnkownShoutout desert*

[@yuan713]

From Africa to America. But aside that, interesting video.

[@Align3]

Woah 45k views, While other pointless videos get millions. This new generation surely is going to fail

[@andrewtucker5170]

damn i love science

[@arpit5493]

We are absolutely not orbiting in exact circular fashion as this lady said, because everywhere in the world the summers are getting extreme hot and winters getting extremely cold. Now i cant trust the credibility of their sources at all.

[@kingclan007]

I love how scientist are able to find out how God created everything. Nice one here😎

[@morehumanity]

Yo is this narrated by Tay Zonday

[@carljensen5730]

The entire earth covered in ice doesn't make sense. Did someone forget to turn on the sun switch at that time? It seems more likely that at that time what is north America may have been the north pole.

[@Fido-vm9zi]

Things like volcanic explosions can block the sun

[@incogniftoar3943]

The sun exist but it's radiation aren't strong enough to cancel out the ice age. Volcanic clouds, earth's magnetosphere, and distance could be the key. Also most likely other unidentified factors. We lacked data, obviously. But the hints exist.

[@KMPM-ov8rw]

Evidence of snowball earth is the Great Unconformity, where about 3 miles of rock were grinded away by glaciers, i.e., a gap in the age of rock above and below. The earth freezes over when its heat exchange system collapses (AMOC, gulf stream) or sunlight is occluded by ash from a large meteorite impact or volcano(s). Interesting stuff.

[@thet3504]

The growth of the Amazon took away the forests in Northern Africa.. The wind and currents carried through South America and deposited in North Africa. As the peoples.left and and I started to over grow the African Sahara was born

[@basemdz6516]

Yea my country owns part of Sahara desert and there's drawings on walls in Sahara of animals like cows and sheep ect It's a proof that the Sahara was green before

[@robertwhitstone3741]

Was probably as green as mars once was

[@basemdz6516]

@@robertwhitstone3741 it was greener in the time of Pharos

[@Fido-vm9zi]

You own it? Why because someone said so at some point? More like at this time part of the Sahara is located there.

[@willemwierenga8920]

Aint the tilt from the earth axel a big reason of climate chance

[@marinkovacevic8732]

No, only humans have the power to change the climate.

[@HamidosAHBY]

yes, but they use this fact to impose their policies

[@changoviejo9575]

Shhhh don't tell anyone about this.

[@gutar5675]

The narrator sounds very familiar. Is that three dog?

[@Zentao420]

The speed of the what has what to do with our weather? Span?....*spun... and only if you truly must be so simplistic. This aired on discovery Channel? Who wrote the script for the narrator?

[@oneshotme]

Enjoyed your video so I gave it a Thumbs Up

[@dtxbygNooN]

So in 20,000 years the desert will be green gtf outta here 😭

[@chukwumaolisehemekaouwarre3236]

Kalahari desert kzbin.info/www/bejne/honNZH-ceb59gq8

[@fabfrenchies1974]

So your telling me global warming is a sham? I already knew it was but now your explaining how.

[@douglasmorris6930]

isnt there evidence of habitation before the land bridges?

[@eurosonly]

The narrator is 3 dog from fallout 3.

[@chukwumaolisehemekaouwarre3236]

Kalahari desert kzbin.info/www/bejne/honNZH-ceb59gq8.

[@44point5]

"15,000 yrs ago plunging temperatures...America was inhabited for the first time" Wrong. I suspect the geo physical explanation for the creation of the Sahara may also be wrong. Did human activities shut down atmospheric rivers flowing over the Sahara savannah just as our species is close to doing in South America especially affecting the vast area south of the rapidly degrading Amazon region.

[@SweetNeoCon407]

Imagine all these climate changes for billions of years and today most scientists blame it all on man.

[@NightRunner417]

Try having everyone in your family piss on the floors every day and see how long it takes to poison the atmosphere to the point where if you don't leave, you die. Same idea. You can't shit and piss eternally inside a closed environment without dire consequences. Even ancient peoples LONG ago knew, you DO NOT SHIT WHERE YOU EAT. If humans had ZERO effect on their own environment like modern idiots cling so desperately to believing, then ancient peoples would have been happily eating their own shit with zero consequences instead of dropping like flies. Who would have thought that the simple concept of cause and effect would die such a miserable death in MODERN TIMES. When I grew up, we VALUED intelligence, knowledge and higher learning. Now society brags endlessly about being as dumb as leeches in mud.

[@AnhTuPhucDerrickHoangCanada]

Hpw can you even disprove such a giant theory

[@segua]

It’s not just 23.5 degrees. That changes

[@佐藤貴紀-j3u]

植林活動には、現地にショベルカーと散水車とトラクターを導入して取り掛かるべきです‼️

[@iulia1690]

Dreidel, dreidel dreidel, with dreidel i will play..

[@user-jt6ej7vh2p]

Why does the shape of earth's orbit change? 🤔

[@BeKindToBirds]

Could be because of the greenland impact.

[@marinkovacevic8732]

Jupiter and Saturn

[@comedowntopapa1184]

@@marinkovacevic8732 then it should affect the moon too, but we always see the same shit.

[@razi_haron]

Earth becoming mars

[@nancytetrick8814]

It's all speculation. However very entertaining.

[@OnlyUkno1]

So was that b4 Christopher columbus found in america

[@aceresidentace]

Hey its 3dog from fallout 3!

[@discontinuedcereal]

Ah yes. New hole after 2050

[@dopeness1524]

What about Africa, was Africa intact during the ice age? 😅

[@stephenjamison504]

This is just science by convience.

[@blkhistorydecoded]

Absolutely agree.

[@d6wave]

this is just a convenient super ironic false accusation (especially if the comment is based on convenience too). there's at least evidence presented in the video, unlike the ironic false accusations convenience comments.

[@robinsss]

i disagree with the theory in the video'' most geographers say that the Sahara is a rain shadow desert i agree the Atlas mountains are blocking the rain clouds

[@john-oh9cr]

yes it's kept up by cycles .

[@cosmic2096]

Universe Inside me.

[@allanawanyo4966]

Clickbait they didn’t talk aabout sahara

[@AnhTuPhucDerrickHoangCanada]

Is that right

[@3rdcarnet927]

I dont believe this tilt theory

[@OnlyUkno1]

How do we know the earth was pulled to the moon specially if there wasnt any proof or human life

[@pablodiablo9178]

Its a good sci-fi movie, but dont present your theoretical story as fact based science. This should have a disclaimer at the beginning. We really dont know, so stop pretending like you do.

[@Deeplycloseted435]

You’re typing this message, likely on an unbelievable device full of microscopic electronics, communicating with satellites in space.......so it is hilarious when people act like nobody knows anything, its all a mystery. Until you have performed science and performed statistical analysis, YOU don’t know a goddamn thing about what they do or don’t know. You couldn’t tell either way. So, since you don’t understand, its easier to just cry foul, and claim everyone is a fake and all these smart people who get payed dick, while living their passion, are deceiving the world.....because reasons that don’t benefit them? Weird, and it doesn’t make ANY sense.

[@falconflylow]

Catastrophal voice on Video. I think its ai

[@WorldwideScents]

America founded by Asians not Christopher columbus...he named them Indians because he thought he was in india...judging off their tan skin

[@davidgillman5368]

It can all be reborn with the cheapest new fusion power and desalinated water despite whatever the solar cycle serves up to us. We need enthusiasm and hard work in permaculture and the cheapest desalinated water. Our old expensive fission nuclear and fossil fuel power production power stations need to be bought into the 21st century. We all need the newest power source to be super cheap to run and this is what you need to learn about. Fusion Nuclear power is that urgently needed, super cheap, green, and 24hr stable electric supply technology that can retrofit old power stations and build new ones on any scale and on a tiny footprint, safely within our communities. Well, it is actually here already. Many plasma confinement technologies like ITER are being experimented with around the world. They are all now enormously superseded by "AUREON ENERGY LTD" and their nuclear fusion SAFIRE GENERATOR. It can react and denature old spent ex-fuel transuranic leftovers and render them safe. The regular fusion physics players believe in an ancient theory of how the sun and all stars operate, which is why they will struggle to ever make commercial power. To catch up they need to study "ELECTRIC UNIVERSE THEORY" and high energy plasma physics and its confining Birkland Currents, operating throughout space. Study all this at "THUNDERBOLTS PROJECT.com" and become a real scientist where you learn to actually throw away old theories when all the new data simply do not fit them anymore and then update all your friends and peers.

[@kr1093]

Mars was greener 🤧🌳🐐🌳🌳

[@hanisitsobarna4897]

how make own desert? 🤣, try with free air to breath word ... 🤞😅

[@joshk.6246]

So the white guys show up and get a Name & Title but a black woman doesn't get the same decency and respect to have her Name & Title shown. 😖🤦‍♂️

[@LolLol-ui3jh]

cilmate chane is real see 😀

[@stein1385]

JHFC why not have michael buffer to narrate. Honestly this should be redone. I find it disrespectful and tonedef. Have a nice day

[@ROBINMALIK23379]

What a beauty like it for its beauty👇👇👇👇

[@استغفرالله-ز4ح7م]

Abu Huraira reported Allah's Messenger (ﷺ) as saying: The Last Hour will not come before wealth becomes abundant and overflowing, so much so that a man takes Zakat out of his property and cannot find anyone to accept it from him and till the land of Arabia becomes meadows and rivers again” we knew this 1400 years ago

[@faisal35i92]

@@montaser9985 Still, it can also apply to the Saharan desert.

[@ebensteven8138]

My God this is the dumbest explanation for this I've heard so far. This might just be purposeful misinformation.

[@paulokeke8337]

Scientists; account of creation is about billion years ago. Bible; account of creation is about thousands years ago. I stand by this....👈

[@dlcoupe]

Narrator sounds like a sleazy christian car salesman and snake oil peddler. The info might be good, but the sound of that narrator's voice screams insincerity and dishonesty.

[@delrasshial7200]

.

[@michaelsmith296]

So as I have always said the earth creates its own climate change.

[@kiranr938]

Yeah. pretty soon it'll be without humans

[@fleur5782]

We are speeding things up

[@carlruffier7947]

No shit! Nothing new thought just maybe you had something new to say, but you just had to make the telling of it R.

[@robd8505]

Fake pics!!

[@scottgraham4392]

Pfft.... this is all rubbish. The world is flat

[@PercyCarte]

If the entire earth was frozen, how did life survive without plants being able to survive? The earth yearly goes through the north changing angles to the sun, precession does not change that. This was not explained properly. 23.5 degrees has been consistent and varies about 1 degree due to nutation. Earth's obliquity oscillates between 22.1 and 24.5 degrees on a 41,000-year cycle with the average being what it is now. en.wikipedia.org/wiki/Axial_tilt