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

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..

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

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

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.

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

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

I enjoyed this dive. Great video, as always

It will be green again one day

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

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

damn i love science

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

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

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

This is indeed great history about the dessert😀.

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

Where did all the trees go?

It’s not just 23.5 degrees. That changes

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

This is just science by convience.

Hpw can you even disprove such a giant theory

The narrator sounds very familiar. Is that three dog?

Yo is this narrated by Tay Zonday

Earth becoming mars

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?

yes it's kept up by cycles .

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

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.

The narrator is 3 dog from fallout 3.

Ah yes. New hole after 2050

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

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

So was that b4 Christopher columbus found in america

Is that right

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

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.

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

Hey its 3dog from fallout 3!

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

"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.

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

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

Clickbait they didn’t talk aabout sahara

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

Universe Inside me.

Catastrophal voice on Video. I think its ai

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

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‼️

It's all speculation. However very entertaining.

Mars was greener 🤧🌳🐐🌳🌳

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.

Truth isn't found in religion. Truth is found in the Living, Proven, Powerful Word of The Most High God. The Creator of Heaven and Earth. What made me first beleive in God? A real life encounter and experience with Him. I witnessed Him supernaturally perform humanly impossible things when I prayed. I was healed of demonic torment in one prayer. My mind was set free and I was no longer being tormented. You're not supposed to live your whole life wondering if God exists... You're supposed to KNOW. And there are actual ways you can tap into the pressence and fellowship of God to witness supernaturally how powerful He is. It takes a sincere heart and a desperate spirit to approach God. You must receive Salvation. Not only is it the thing you must do to experience anything from God, receiving and not receiving is quite literally the difference between life and death. Judgement is assured for the unrepentant. Those who rejected that loving call from Christ. They will be thrown into the lake of fire for an eternity of suffering, torment and pain that is incomprendable to the human brain. If you want to know how to be assured you'll be saved of the dreadful things that are about to come upon the earth and an eternity of seperation from God, please message me. Tomorrow isn't promised for any man.

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

Enjoyed your video so I gave it a Thumbs Up

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

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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.

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

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

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

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

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.

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

Fake pics!!

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

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

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