The 6th extinction event


Cliffy
#1
We're Killing Off Animal Species So Fast Extinction Is Outpacing Evolution

The human-driven extinction of mammals is outpacing evolution, researchers report in a study. The next 50 years may see extinctions so devastating it will take 3 million to 5 million years for the animal kingdom to recover.
But human action could help stem this catastrophic loss, authors wrote in the journal PNAS. Improving conservation efforts could save “billions of years of unique evolutionary history,” they reported.
The world has seen several mass extinctions, where drastic environmental change slices off many limbs from the tree of life. Millions of years of evolution helped replace lost species with new ones.
"Large mammals, or megafauna, such as giant sloths and saber-toothed tigers, which became extinct about 10,000 years ago, were highly evolutionarily distinct. Since they had few close relatives, their extinctions meant that entire branches of Earth's evolutionary tree were chopped off," study author paleontologist Matt Davis of Denmark's Aarhus University said in a statement.
Certain animals may survive extinctions because they have hundreds of species, he said. But others are far more vulnerable to collapse. There were just five species of saber-toothed tiger, for example, so “they all went extinct."


https://www.newsweek.com/mass-extinc...Osfe_xTTmgTb9g
 
MHz
#2
Did they move to the 7th heaven?
 
Cliffy
+1
#3  Top Rated Post
 
MHz
#4
Make sure they don't go north, the further you go the worse it gets, literally. Welcome to Canada, . . . cough? More pretty candies?
 
Hoid
#5
There were just five species of saber-toothed tiger, for example, so “they all went extinct."

There are 7 apes including man?
 
Cliffy
#6
Quote: Originally Posted by Hoid View Post

There were just five species of saber-toothed tiger, for example, so “they all went extinct."

There are 7 apes including man?

Almost all the apes are on the threshold of extinction, including humans, as we continue to destroy habitat and environments, we too will die off from our stupidity, greed and arrogance.
 
Dexter Sinister
#7
But the planet will be fine. It'd be better off without us anyway.
 
spaminator
#8
 
MHz
#9
Which one was the Siberian Traps?
 
MHz
#10



http://www.snowballearth.org/week1.html





Can the years be given on there graphs?
 
Dexter Sinister
#11
Quote: Originally Posted by MHz View Post

Which one was the Siberian Traps?

They're at the Permian-Triassic boundary, around 250 million years ago.
 
MHz
#12
One the top chart it should include both lines and also be the cause of the ice in the south melting. The Traps spilled out a known amount of magma and the temp can be estimated and the heat released into the air can be calculated but not gas change unless Greenland or the Antarctic ice cores go that far back

Since the last global ice age 650M the south has had ice when the north was ice free it is possible that the crust was warmer without lava breaking through to the surface and the heat radiated by the traps took about 100M years to cool down and the temp seems to have balanced out so north and south experience the same changes at the same time. The oceanic crust dates back 200M years and the spreading in the north created more area than in the south. With just a quick look at the rock formations in BC and the east side of the Mississippi the formations are in the same direction as the Atlantic Rift and the Pacific Rift.
The AB/BC border should be where the rift broke through the surface, prior to that it could have moved all the way from the Great Lakes is the land formations allow that. The C. Shield could have been a Siberian traps type of event only much earlier. The Great Lakes and Hudson Bay would have been the up-flows (same with the Gulf of Mexico) and when that stopped and the cooling took place the holes were created. If the Yellowstone caldera was by the Great Lakes way back then it was on its way to becoming the next lake in a chain.
Since I have my doubts about ice carving the holes for a few reasons those lakes would have been up flows and cooled and shrank. Same with all the lakes in Canada’s north.
A retreating glacier would leave gravel bars like there is in AB. When ice is 1 mile tall and moving to the ocean the ice would break where the beach is and only the ice higher would move until the sheet melted. The peaks would be cut off and
The theory behind that would also have to be the answer to the ‘cart ruts’ found in a few locations in/near Germany. If the surface bock was magma flowing up of the ground cracks that match the ruts then when the flow stopped and the cooling started the magma in the cracks would shrink more than the rock that was fractured rather than melted.

In the 2nd chart 250MYA would be the dip in ice, if all that heat was needed to change it that much what changed it 125MYA as 2x as much sea-ice was gone. Another Siberian traps event only the surface rocks only got warmer without breaking apart. The pressure being spread out under a larger surface only has 40,000 miles of oceanic rifts spreading a 1”/yr, or take a few more.
If they ever stop and the earth wants to contract it will be the crust above where the magma already descends, it will dip more and eventually break and the crust will end up being vertical rather than horizontal like it is today

The ‘snowball’ part should have been when we gained all the ice that is now the water we have. It came in so thick that it could not be melted in real time, 2x rather than 1 if that is the whole history.

I will probably want to add to this.
 
Cliffy
#13
“In this epic moment of radical environmental and social disruption, the world is experiencing the dawn of a revolutionary transformation to becoming an ecologically literate and socially just civilization. The existential gauntlet is to make the shift fast enough to outrun global cataclysm. The next five or six years will be the once-in-a-civilization window to change course. We can move from breakdown to breakthrough. The Mayan people call this the “Time of No Time.” From here on, we’re on Earth time. Mother Earth is shaking to her core. It’s a time of madness, disconnection, and hyper-individualism. It’s also a time when new energies are coming into the world — when people are growing a new skin. The Mayan vision says we in the West will find safe harbor only if we can journey past a wall of mirrors. The mirrors will drive us mad—unless we have a strong heart. Some mirrors delude us with an infinity of reflections of our vanity and shadows. Others paralyze us with our terror and rage, feeding an empire that manufactures our fear into resignation. But the empire has no roots and it’s toppling all around us. In this time, everyone is called to take a stand. Everyone is called to be a leader. To get beyond the wall of mirrors, the final challenge is to pass through a tiny door. To do this, we must make ourselves very, very small. To be very humble. Then we must burrow down into the Earth, where indigenous consciousness lives. On the other side is a clear pond. There, for the first time, we’ll be able to see our true reflection. In this Time of No Time, we can go in any direction we want—by dreaming it. Our dreaming can shift the course of the world. Paradoxically, the crisis confronting us today is precisely the dream of our current civilization. That dream of endless growth, hyper-individualism and domination has turned into a nightmare. How do we dream our way out of a nightmare? One way is to wake up. All over the world, people are awakening to a new dream. We’re re-imagining a civilization in the Age of Nature that honors the web of life, each other and future generations. It’s a revolution from the heart of nature.”
~Kenny Ausubel

 
petros
#14
99.9% of species that ever lived on earth are extinct and have been for eons.
 
Hoid
#15
Therefore extinction is inevitable
 
Jinentonix
#16
Quote: Originally Posted by Hoid View Post

Therefore extinction is inevitable

Yes, yes it is. Heck, the fact this planet is a place where complex life can even exist at all is the result of a rather large number of "lucky accidents". So is our very own existence. The fact that we owe our existence to some random 10km hunk of space rock slamming into Earth 65 million years ago is an example. And yet, the same catalyst that ultimately allowed humans to evolve could be the same type of event that wipes us out.
A nice gamma ray burst in our direction would pretty much sterilize the planet even if it's not from a nearby star.

Our planet's own geological upheavals have caused mass extinctions throughout Earth's history. 75,000 years ago a massive volcanic eruption reduced the world's estimated human population to one that could fit inside a small 3000-5000 seat music hall. That's how close humans came to disappearing as a species.

The one advantage that we (and other animals) have is our ability to adapt to various climatic conditions. Some species are highly dependent on a stable environment, any significant change will wipe them out. That's because they are more highly specialized to operate in that one type of environment.

There will be future events we have zero control over that will almost wipe out humanity as well, but eventually one of them will be our doom. Unless of course we do it to ourselves first.

Even the universe has a finite existence.
 
MHz
#17
Ever think we are still a work in progress. Rather than 10,000 years this is more like 10M years.

https://www.youtube.com/watch?v=Fa2TDGXf1EU
 
darkbeaver
#18
Quote: Originally Posted by Dexter Sinister View Post

They're at the Permian-Triassic boundary, around 250 million years ago.


None of the dating methods are anywhere near that kind of accurate time determination with any reliability better than a guess.
 
MHz
#19
You still have to start somewhere. If we don't know if the planet is warming or cooling, or both at the same time I do not demand the dates in the past are accurate at the start of the topic. They should be as close as needed by the end of things and if they start 4BYA that is a lot of blanks space to fill in. 200M years is in the oceanic crust and the formations on land take it even further back by billions of years.


IMO they have the right past but it is hidden as it shows what the future will be and they need time to set it up that only a very few benefit from from the changes. IE, North Africa is a desert now but at times in the past it was 'green', if the only changes that take place are ice-ages coming and going then the place cannot be a desert now and get even drier during the climate that is the most opposite. That would be the same around the globe so the desert belt would take on the green color to the N/S of it today. We eat green things and that area would be green all year long.

I don't find that to be very frightening really.
 

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