I have KZfaq Premium, but thanks to Spark I still get to watch ads.

I’m a delivery driver in metro Detroit and our sprawl is getting ridiculous. We are putting Walmart’s and strip malls in every field and forest within 75 miles of Detroit. In the past fifteen years since I started it has been dramatic. I drive past Canadian geese families all day long living around the fake run off evaporation ponds we build around these concrete slabs. These geese have been coming to these specific spots for thousands of years and we paved them over and they eat on the little patches of grass on the side of the road. They look homeless to me I feel so bad for them.

There's just something so bone chilling about The Great Dying. It's like the planet dodged a bullet by a hair's breadth, from becoming a dead rock like Mars.

Imagine all the different species that have ever existed.. Boy would I like to see each one in person.. May life live forever!!

It's incredible to think that this happened on the same planet we're on right now!

I think the Green lady has got her P's & Q's mixed up there, 4:00 Tree roots dont cause erosion to my knowledge, they prevent erosion by keeping the soil there !

Each geologic period ended with an extinction event. The others were not as severe as the Big Five.

Special thanks to the camera man who traveled in time to film everything.

I am surprised by the low quality of information about the extinction events in this video. PBS Eons and many other KZfaq science channels cover this topic much more accurate and concise.

….why wasn’t the great oxidation event included on this list? The worst extinction event that killed off close to all prior anaerobic microscopic forms of life.

Excellent explanations. I like the explanations

Even small power outages can freak out small communities because people can’t get things from stores because the stores close down because you can’t pay with card or cash through their systems. People will freak out and lose their minds over the smallest things.

A constant state of flux always changing is the norm and I find it very interesting that people usually think of geology as the big determining Factor for Global change when there's another one that's at least as effectively as geology is when it comes to making global environmental changes and that is biology which is seldom discussed outside of the scientific community and I think we should maybe do something about changing that and bring biology into the public realm of discussion.

The odd thing about this... is its appeal to how we should perceive change over time - though it's the exact opposite of a rational perception regarding change over time.

This is the scariest video I've ever seen. My son came home from school saying he will not have children and I took it ,like most, you will change your mind one day. As an adult he tells me he would love to have children but won't because the world will change and he couldn't do that to them. It's heartbreaking truth this video is what he means

More people need to see this documentary. The most clear and concise recordings of cause and effect. I'm no eco-warrior...but we need to CHANGE. This made me cry and it's humbling. Thank you for being here to educate. Today, I don't want to bring a child into the world, because I'm scared..And people are doing..........not a lot. It's terrifying.

The 252 million year old extinction event was associated with the Basalt from the Siberian Traps. Enough Lava came out to cover all the Earth 10 feet deep in basalt. The Antipode was in Antarctica where a very large impact event occurred. The one at 66 million years ago only has enough lava to cover the Earth a mere 3 feet deep. The antipode is the Chicxulub Impact event. Giant impact events fracture earth on the opposite side of the earth. The energy re-focuses at the antipode using reflection, and refraction of energy waves.

Am I the only one that realized, nearly every single expert, seemed like they were struggling to articulate their thoughts??

"Extinction is the rule. Survival is the exception." -Carl Sagan

definitely right there sir...

“Unless conserved…” humans can be mindful but to think we can stop a mass extinction event is the pinnacle of arrogance

I’m impressed that the nature of plant roots changed so much! Today plant roots are considered to stabilize soil and reduce erosion. I have NEVER before heard of plants increasing erosion. Seems an unsound hypothesis.

What a wonderful documentary

I love this video

13:10. No no no! Lystrosaurus was not the ancestor of dinosaurs and mammals alike. Lystrosaurus was a synapsid, and synapsida is the group that gave rise to mammals. But dinosaurs were sauropsids. The two lineages had already split long before Lystrosaurus evolved.

This is one of the most interesting documentaries I have ever viewed; also one the most frightening. I like the explanations of the past extinctions & when, not all the facts are not in, it is really made clear with some educated guesses.

Ridiculous amount of ads.

Dang! Glad I'm here. (That one fellow looked familiar. Is that officer Jim Dangle, Reno 911?)

Aren't the "trees" mentioned at the beginning of the film the fruiting bodies of Prototaxites , one of the earliest terrestrial fungi? Don't miceilia (sp) hold soil thus help prevent erosion?

I wonder if the asteroid had an effect on volcano activity? 🤔 It seems to me that the Earth is usually in balance keeping volcanoes in check most of the time. It seems reasonable to expect an increase in volcano activity shortly after the asteroid's impact. Like ringing a giant bell.

unbelievable to think that this happened on the very same earth we are on right now.

Denial, anger, bargaining, depression, extinction. We are still firmly rooted in denial.

I’m very intrigued about this 🤔, but could be from the intriguinol I took this morning

Excellent explanations of earth’s past & where we are now. New rock type made of plastic says it all for modern human life.

Far better documentaries on this subject out there.

Amazing to think that this happened on the same planet we are on right now! 🌎👀

I love how a fact checker from KZfaq has put a " context " tag on this video about climate change and how it's caused mainly by humans, But yet the video is about climate change from a time before there were any humans on Earth. Thank you KZfaq for the Context!

I thought root structure help to stop erosion

Solid choice of experts/ professionals to opine on this topic. Thank you! Well done and pretty solid! Thank you again ❤

Obviously, the Earth has always been on a knife edge. Plus, it is amazing how many changes have occurred. Also, the severity of some of the changes in very short time periods. Tragically, human self-interest will be paid for many times over.

5:17 Didn't realize Eddy Izzard was an expert on climate change. Great job Eddy...... Keep up the good work!

Very interesting! Well done!

Nice

At 22:24 he starts to talk about the current "perfect storm" of conditions and then adds "not just climate change induced by humans" and then starts to enumerate them, 'deforestation', 'urban sprawl', 'habitat fragmentation'... All, notoriously, 'induced by humans'

Watch this again with friends and do a shot every time they um uh probably think or maybe. It’ll be a very short night.😂

Dude... An extinction Level Event, is likely something we could never have any chance of avoiding or stopping...

Nice documentary. Holly molly lady, the strongest accent ever!

Life will undoubtedly go on , unfortunately the human race may not , and it’s no more than we deserve 🤷‍♀️

The next mass extinction will not destroy this planet. We in our hubris and arrogance may be gone but other lifeforms will emerge and flourish

How would trees cause extreme erosion and the loss of soil into the oceans? Looking for an explanation.

You have my Heart..

Mr. Burns from The Simpsons stated he was as old as Pangaea. Wonder what he experienced? 😂

1st thing I notice about this channel is that there are no references linked in the description of the video.🤔

I am looking forward to this one

Or in the future when an A.I scientist is doing field research for his doctorate , he finds there was an anoully species that appeared for a short time between layers in the soils that make up the in between what would be considered a layer in time.

Can someone clarify he said “ our current ice age”, so we are currently in an ice age ???! That’s wicked news

Can you make video about diffrent species of humans?

What humans do to earth is exactly how we describe and fear what aliens would do if they came here..... I think that fear is memory of what we did long before anyone can remember or has been recorded in history or forgotten.

If we're in the 6th great extinction then I have to work on my extinction pose 🤪😑😮‍💨😒😱. Great documentary 👍👍

The Vredefort Crater in South Africa is 190 miles wide as opposed to the 110 miles of the Chicxulub Crater. The latter impact ended the dinosaurs 66 million years ago. Vredefort was 2000 million (2 billion) years ago. One can scarcely imagine what happened.

Almost random sound bite inserted "Lystrosaurus was the ancestor of both dinosaurs and mammals alike." Sorry but Lystrosaurus was a synapsid and could not have been the ancestor of dinosaurs.

4:19 large trees dug roots causing erotion... roots dont cause this, wind and water do, roots help hold ground not release it

Amazing video!!!

idk if I like knowing there could be a catastrophic event happen to extinct the world or if i’d rather just not know

It is a great documentary .Thank you

Also, when plant life is overabundant, the atmosphere also gets to high a concentration of oxygen. But with that comes low CO2, which is a requirement for most all plants, which then die off since there's no food for them to continue growth. As they die off, the bacteria consume those and you'd get lts of CO2 again, and this can happen rapidly from a geological point of view, like every million years or so.

7:23 That dragon fly is like a alien the way it made a sharp turn

One of those videos that one should watch... and then watch again immediately.

The current ice age we live in has flip flopped between interglacial and glacial periods at least 17 times!

The Permian Extinction part forgot to mention the Siberian Traps. Hmmmmm.....

Powerful 🥺

Crocs survived!!!! There used to be so many different types and now we are limited...

the basic presumption at the video beginning is that man can actually do something about a polar shift, inbound asteroid, etc. Do I need say more?

Never considered that 'extinct' might be chilling. After all, we wouldn't be here without it. Oh, well maybe that's the point.

what if the bermuda triangle is actually the core remnant of the asteroid that hit the yucatan? maybe it burrowed 13 miles down maybe but at an extreme angle.

"IGNORANCE IS BLISS" scary visions..

We've documented all the previous mass extinctions, now we'll be keeping a record of our own.

Did I lose count? I thought they were going to discuss the “Five Mass Extinction Events.” They detailed 3, or maybe 4, then a geologist led a discussion on ecosystem collapse. And another scientist states, boldly, that the greatest threat to Earth is global climate change? I mean, climate change is worse than the fragmented comet that rained across the northern hemisphere for over two decades toward the end of the last ice age? Really? Wow. I actually subscribed here thinking I’d get some science.

This is excellent. 🌟🌟🌟🌟🌟 Crystal in Canada 🇨🇦

Thank you so much for this. I so admire these scientists. Men and women at their most noblest. ❤

No prizes for guessing whats going to cause the next extinction event.

The UN need scientists to deep dive around the Indian ocean and find how much the huge Chinese fishing fleets have stripped the oceans of all marine life that is eatable

Great

In my experience plants, and plant's roots help stop erosion. Areas like deserts with no plants have heavy erosion because there are no roots to hold the soil. How was it the opposite four hundred years ago?

That was very informative and helped me realise the greater need for humans to work together.

This is a new one for me. Thank you very much! If you can’t tell,s**t’s about to get real.

Cue the "We're all gonna die in the next 10 minutes!" background music while they all head to Davos in private jets to present their latest papers.

10:47 I found real life Butter's from South Park! The hair the face yeah Butter's

This is such a powerful documentary. It just shows how fragile life is and how us apex humans are just so oblivious to what's accruing it's crazy. Makes me upset. Life is so complex. I love this kind of content. Smashing stuff spark. 👊

what they never talk about is how we can reduce our population over time and live in balance with our planet, population size is the biggest threat to our species survival

This explains the #5 vision

Hi. Great work, especially the very long-term correlations between CO2 levels, temperature, and ice-melting. However there's one aspect of temperature rise I've never seen covered on a climate video, and that is "how much extra water evaporates in the tropics for each degree of temperature rise?" Obviously this is important, because if more water evaporates in the tropics than melts at the poles, the sea levels will go down, not up. Humidity, rain, and cloud cover will also increase, the latter reflecting away sunlight which will lessen global warming, but the humidity will increase it, like a heat trapping blanket. A major factor can be seen with a glance at any globe of the Earth: There is ten times as much area for evaporation in the tropics as there is area for melting at the poles. So which has the most powerful effect on sea levels, or have we reached a natural balance? I'd suggest that until we have some hard our computer models are no better than educated guesses. Confounding things further is that we use Mercator's two-dimensional projection of our three-dimensional globe, and this grossly distorts the relative sizes of polar areas and tropic areas, making the former look far larger than they are, and the latter smaller. We see a full width band of white at the top and bottom of the map and tend to panic when considering it all melting. It's more illusion than substance, but it still conditions our thinking with an unhelpful distorted perspective. A simple experiment could help sort this "melting versus evaporation" equation out. Make low flat-topped forty-foot triangular glass-houses, modelling the correct size dimensions of segments of the earth between the pole and tropics, and partially fill each with salt water. The bottom of each segment will vary according to the known contours of the sea floor, so the total quantity of water in the segments will be proportional to the oceans as well. Each triangle's apex, representing the polar area, would be chilled to the average Arctic or Antarctic temperature. These apexes will become mini- icecaps. The much wider bases of the triangles, representing the tropics, are heated to sea temperatures at the equator. Evaporating water at the base would migrate to the cold apex, and condense, as happens on earth now. This experiment could accommodate ocean currents, but it could not model weather air movements very well. It could at least give us a crude base of real-world knowledge. Computer models alone are not good enough, especially when they don't include measurements of evaporation. (Garbage in, garbage out.) Next, raise the temperature one degree C both at the poles and equators, then observe and measure. And so on. An experiment like this (but hopefully more sophisticated), could determine whether the hypothetical "tipping point" actually exists, and at what temperature it kicks in if does. Thanks for a very thought-provoking video, keep up the good work. Cheers, P.R.

What if all of this things is a lie ???

Prof Jeffrey Stilwell should work on a Jeff Goldblum impression! 5:17

I love these videos because they focus on interesting and fascinating objective knowledge free from the fantasy politics getting spewed about everywhere else. Thank you.

Someone here asked if the asteroid that caused the dinosaurs extinction may have had an effect on the volcanic activities we experience in our time today. I think that's a very reasonable question! It's certainly not beyond the realm of possibility 🤔🤔

Imagine that, earth has cycles of warming and cooling...........

Being as asteroids, comets and meteors have made their way here from other systems, and our own systems other planets, we may never know if earth has flourished from deposits from other planets total destruction. It's not impossible, and could be very likely that some of our restarts were the end of others that were thriving

Yea been trying to get my son to understand he's 29 💀😬 he's in denial about global warming, among other things 😞

It makes me very sad to know what we have done to this good earth. Our time will come.