New analysis of Chicxulub asteroid suggests it may have struck in vulnerable spot

November 10, 2017 by Bob Yirka, Phys.org report
Artistic rendition of the Chicxulub impactor striking ancient Earth, with Pterosaur observing. Credit: NASA

(Phys.org)—A pair of researchers at Tohoku University has found evidence suggesting that if the asteroid that struck the Earth near Chicxulub 66 million years ago had landed almost anywhere else, it would not have been nearly as destructive. In their paper published in the journal Scientific Reports, Kunio Kaiho and Naga Oshima suggest that had the asteroid struck another part of the planet it is likely the dinosaurs would have survived.

Scientists around the world have reached a consensus regarding the reason that the dinosaurs (except for bird relatives) went extinct—a large asteroid struck the Earth just off what is now the Yucatan peninsula, hurling so much soot and other material into the atmosphere that the planet became too cold (for approximately three years) for the dinosaurs and most other land animals to survive. But now, it appears that they might have survived had the asteroid struck almost anywhere else.

To learn more about the event that had such a huge on the history of our planet, Kaiho and Oshima used a computer to analyze multiple data sources surrounding the impact and the location where it struck—the resulting simulation showed how much soot would have been generated based on the amount of hydrocarbon material in the ground near the impact site. Such hydrocarbons would include not just oil or coal deposits, but other rocks that also contained oil—more hydrocarbons would mean more soot and gases making their way into the atmosphere. The research pair also created a map showing surface densities across the globe at the time.

They found that the site where the asteroid struck was particularly dense in hydrocarbons—87 percent of the planet surface was less dense. That means, they claim, that if the asteroid had struck a place where it was less dense (which would have been almost anywhere else), much less would have been generated, and thus, the planet would not have cooled as much. And if the planet had not cooled so much, the might have survived, and that might have meant that we humans would never have had a chance to evolve.

Site of asteroid impact changed the history of life
Mass extinction only occurred when the asteroid having 9-km diameter hit the orange areas. Credit: Kunio Kaiho

Explore further: Did a burning oil spill wipe out the dinosaurs?

More information: Kunio Kaiho et al. Site of asteroid impact changed the history of life on Earth: the low probability of mass extinction, Scientific Reports (2017). DOI: 10.1038/s41598-017-14199-x

Abstract
Sixty-six million years ago, an asteroid approximately 9 km in diameter hit the hydrocarbon- and sulfur-rich sedimentary rocks in what is now Mexico. Recent studies have shown that this impact at the Yucatan Peninsula heated the hydrocarbon and sulfur in these rocks, forming stratospheric soot and sulfate aerosols and causing extreme global cooling and drought. These events triggered a mass extinction, including dinosaurs, and led to the subsequent macroevolution of mammals. The amount of hydrocarbon and sulfur in rocks varies widely, depending on location, which suggests that cooling and extinction levels were dependent on impact site. Here we show that the probability of significant global cooling, mass extinction, and the subsequent appearance of mammals was quite low after an asteroid impact on the Earth's surface. This significant event could have occurred if the asteroid hit the hydrocarbon-rich areas occupying approximately 13% of the Earth's surface. The site of asteroid impact, therefore, changed the history of life on Earth.

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TheGhostofOtto1923
2.6 / 5 (10) Nov 10, 2017
Some might take this as evidence to suggest that the dinosaurs were intentionally extincted because after 180 million years in existence they had failed to produce a sentient species; while mammals on the other hand produced one after 70 million or so.

A failed design? An unforseen dead end? Humans have been husbanding themselves in the unnatural environment of tribes for a million years; has life on this planet been husbanded since its inception?
Steelwolf
1.1 / 5 (12) Nov 10, 2017
Or it could be seen as evidence of a war on a massive scale. Possible a Sauran Civ going high tech, tries to destroy their political opposites by dropping large rocks. Is an easy enough scenario.

Sure, many see it as science fiction, however it is more properly Scientific Speculation: We are always setting up new hypothesis and either finding them right and working, or clunky and needing more work and refinement.

With examining our deep past, if there HAD been a high tech civ in the area of the impact, then there would be nothing left for us to find, unless it is found beneath miles of ash and limestone and other sedimentaries as well as lava flows etc. We can find very few items from even our own Colonial Period a few hundred years ago, so identifying stuff that is several million years old is going to be a lot of fun.

Yet we HAVE found such, in coal veins and the like, tech and items that should, by all rights, not be there ...yet they are. We are older than we think.
Nik_2213
1.4 / 5 (7) Nov 10, 2017
"...we HAVE found such, in coal veins and the like"
IIRC, further investigation found ample evidence of prior artisanal mining and collapsed tunnels.
katesisco
1 / 5 (7) Nov 10, 2017
Yes, we have discovered out-of-place artifacts. Even our hundreds of satellites have yet to 'see' anything but stone. Which leads to nonsensical theories of space aliens, etc. We can't explain what we see; we know something is missing, we don't know what. We can't explain the Dark Age of Greece, the Dark Ages of N Africa, the collapse of the Early Copper Age and its degraded replacement. We can't explain the 'taming' of dogs and cattle at the same time and same place; we're completely baffled.
I guess we'll have to wait for the next super cosmic blast, the 'white light' result, the compression wave that socks us with Oort cloud elements, and the magnetic soliton wave that recovers us.
rrwillsj
3.9 / 5 (15) Nov 10, 2017
It always amazes and amuses me the desperate straws of ridiculous assumptions that people grasp at to explain away natural phenomena.

Among pseudo-libertarians is the constant whinge about all the regulations protecting them from their own stupidity. Specifically bemoaning health regulations and licensing of barbers and cosmeticians. They never learned to spell typhus and the stupes fail to realize to what degree they are insulting their grand-father's grand-father!

Who had an all to intimate relationship with lice, fleas, tapeworms and other disease bearing vermin.

After all, you survival-of-the-wickedest should appreciate that such vermin and their associated plagues are NOT extinct. They are just sulking in hiding until you altrights insist on your right to masochistically inflict the next pandemic on humanity.

Deluding yourselves that you are competent to survive. Since you're already Morlocks, won't need any extreme adaptations to your New World Order.
tblakely1357
3 / 5 (3) Nov 10, 2017
Cool, is there anything fossil fuels can't do?
Da Schneib
4.6 / 5 (10) Nov 10, 2017
Cool, is there anything fossil fuels can't do?
Make more energy without increasing CO₂.

On Earth.

Next?
Eikka
2 / 5 (4) Nov 10, 2017
Two assumptions:

1) it had to be hydrocarbon soot that destroyed the dinosaurs

2) the mammals weren't evolving anyways
RogueParticle
3.3 / 5 (7) Nov 11, 2017
@rrw - nice one :)
RogueParticle
3.5 / 5 (8) Nov 11, 2017
@sw
Yet we HAVE found such, in coal veins and the like, tech and items that should, by all rights, not be there ...yet they are
Yes, I can remember back to my own childhood when we would have an open coal fire in the living room, and all of us being most annoyed when yet another dinosaur tech item buried in a chunk of coal on the fire would fail to burn, or worse, explode, showering us in dinosaur transistors or pieces of their coffee mugs. To say nothing of the clouds of iridium dust (which can be seen in the geological record) which would be released, playing havoc with the old Baird TV set. Glad those days are over...brrrr.
RogueParticle
2.6 / 5 (5) Nov 11, 2017
Dammit, @DS, I wish I knew how you manage to get those subscripts to show...
TheGhostofOtto1923
5 / 5 (5) Nov 11, 2017
Lets see... CO2 CO₂

-So I copy pasted this and then hit edit, and didn't get any of the wierd characters you usually get when you try to edit odd text.

So I suggest copy paste.

I can do this ♧¿ğß can you?
derphys
not rated yet Nov 11, 2017
Another historical proof that too much CO2 heat too much !!
In the earth over 500millions past years, there is stocked as hydrocarbon material in the ground, quite more that is necessary to burn all the oxygen that we breathe, with this hydrocarbon material comming back into CO2.
For every molecule of O2 that we can breathe, photosynthesis stocked into the earth one atom of reduced hydrocarbon material C, ready to be burned, renewing every 0.2 million years all the O2 of the armosphere , since 500millions years with O2 useful for the life..
torbjorn_b_g_larsson
4 / 5 (1) Nov 11, 2017
Obvious nitpicks:
- Dinosaurs survived, just not the non-avian clades,
- Humans had always a chance to evolve, distant outcome of evolution is not bounded. But the changed contingency would make it even less likely.

@TGO, SW: You are joking since you do not present evidence. In addition, TGO, outcomes of processes in nature can obviously not be 'designed', that is what complex agents like humans are described doing.

RogueParticle
3 / 5 (6) Nov 11, 2017
@tgo, Ħęă⩔⫕
Osiris1
1 / 5 (5) Nov 11, 2017
The big dinos already had been in decline for a long time, and mammals were increasingly challenging them. Intelligence would still have arisen inasmuch as we got our real creative intelligence from alien bioengineers who also installed the carriers of our souls, our nishamas, and that happened about 13000 years ago give or take a few thousand. Before that, man had not made much more than hand weapons or stone. Our alien visitors had an entire world of species to 'improve'. They chose US! They would do so again as there were and are many primate species, some bipedal like bonobos. Might have been better if they chose bonobos and worked a little longer. Bonobos believe in love, not war.
rrwillsj
3.5 / 5 (8) Nov 11, 2017
Sooo... Let me get this straight.

O1 and friends are accusing Aliens of meddling with our ancestral genome? Well they sure as hell bungled the job as shown by all our genetic failures. Orange hair as an example of innate buffoonery.

O1, like the stuporstitious and their Insane Clown Posse of godlings, you are making excuses for your own (very human) failings in life.

Grow up, accept responsibility and physically do something that will benefit others.

You'll feel a lot better about yourself.
Kalopin
1 / 5 (7) Nov 11, 2017
NO!, "they" [mainstream] have it all wrong!
The Moon impacted the Tethys sea 13kya [YDB] ...and is what wiped out the dinos, as well as a other megafauna/flora, as this increased gravity, electromagnetism, ground-level radiation and the length of the day... making it impossible for the larger animals to exist, having developed genetic coding in lesser gravity...
Please study every detail [discussion, link,...] and find the truths behind the myths...
Kalopin
1 / 5 (6) Nov 11, 2017
...and, before anyone makes "that" comment, please review these findings first- https://www.linke...ny-hood/
jonesdave
4.6 / 5 (10) Nov 11, 2017
...and, before anyone makes "that" comment, please review these findings first- https://www.linke...ny-hood/


There is absolutely no end to the crap that some people will believe!
Kalopin
1.4 / 5 (8) Nov 11, 2017
Why did the elder dryas grow so much larger than the younger dryas? ,and there is only a layer of iridium, platinum, vitrification,...between?

Why did they recently find dino bones with skin and feathers intact in China? ,and the recent finds in Canada? , and why were red blood cells found in many bones, over twenty-five years ago?

Why is there an entire city buried beneath limestone, melt rock on the Yucatan, above what is known to be Chicxulub "crater"? ...is this the same limestone to form the Ozarks? ...and was it ejected from beneath the Mediterranean?, along with the ejecta blanket, which reached temps upward of 2200*C?

Would any form of life be able to exist beneath the YDB strewn field, which covered a good portion of over four continents?

Why does every single mountainous anomaly have the same westerly projection, all emanating out from the Mediterranean?

Why do all the megalithic structures end abruptly and much smaller stones become the norm?

Kalopin
1.4 / 5 (9) Nov 11, 2017
Why are dino bones more porous? ...was there less gravity during the Pleistocene?
Why are dino bones radiated? ...could it be from the heat of the YDB ejecta blanket?
Why was the north American continent so devoid of life [horses?, pigs?,...]?
Why was it considered to be "the new world"?
Why does every single tectonic interaction reverberate out from the Mediterranean?
What forced the Indian plate into Eurasia?
Why do so many mountains line up between the Americas &Africa, Europe?
Why is the scraping and scarring across the Atlantic still so clearly visible if it drifted over millions of years?
Why did all the megafauna and megaflora disappear at this same moment, at the YDB?
Why are there so many historical accounts of people living much longer and growing much bigger?
Why is there so much obvious misunderstood technology, in everyone's face?

Read more at: https://phys.org/...html#jCp
Kalopin
1 / 5 (8) Nov 11, 2017
Did the Moon impact this planet 13kya at the YDB?

...could it be that, when the Moon impacted 13kya, it slowed the lithosphere, outer plates and mantle further, in relation to the faster spinning, crystalized inner core?, would this have increased electromagnetism, gravity and the length of the day?, also increasing ground-level radiation?
...would this have made it impossible for the megafauna to exist? ...having developed genetic coding in lesser gravity?

...is the Moon the crystalized iron, inner core of a once habitable planet?
...has it impacted this planet on a somewhat regular basis?
would a planetary imbalance produce excessive wobble on axis, allowing such an event?

[-;...welcome to reality... ;-]
Whydening Gyre
5 / 5 (7) Nov 11, 2017
Sooo... Let me get this straight.

O1 and friends are accusing Aliens of meddling with our ancestral genome? Well they sure as hell bungled the job as shown by all our genetic failures. Orange hair as an example of innate buffoonery.

Hey! I resemble that remark...:-)
It ain't ain't orange - it's strawberry blonde...
(mine is, anyway)
You have show title there, tho. Orange is the New Stupid...
Whydening Gyre
5 / 5 (12) Nov 11, 2017
NO!, "they" [mainstream] have it all wrong!
The Moon impacted the Tethys sea 13kya [YDB] ...and is what wiped out the dinos, as well as a other megafauna/flora, as this increased gravity, electromagnetism, ground-level radiation and the length of the day... making it impossible for the larger animals to exist, having developed genetic coding in lesser gravity...
Please study every detail [discussion, link,...] and find the truths behind the myths...

You missed the part about how the stoned aliens driving the moon accidentally bumped into the Earth and decided to park in orbit til they slept it off...
HocusLocus
5 / 5 (4) Nov 11, 2017
Some might take this as evidence to suggest that the dinosaurs were intentionally extincted because after 180 million years in existence they had failed to produce a sentient species; while mammals on the other hand produced one after 70 million or so.
50 years into the space program and there is NO credible asteroid defense mission ready to fly. The jury is still out.
Steelwolf
5 / 5 (2) Nov 11, 2017
WG: I saw that Movie: "Wow Man, GOOD Nyborg!"
jonesdave
4.3 / 5 (6) Nov 11, 2017
Wow. You've got to love woo, don't you? This thread is full of it. Deary me. Shame that some people's IQ doesn't exceed their shoe size. Still, it's always a laugh.
Captain Stumpy
5 / 5 (1) Nov 12, 2017
WG: I saw that Movie: "Wow Man, GOOD Nyborg!"

ditto!

"Have her bound and washed. Then... bring her to me."

"He never did anything that was illegal... Unless you count all the times he sold dope disguised as a nun"
rrwillsj
2.3 / 5 (6) Nov 12, 2017
The Uranus Conspiracy strikes again! O1, Kp, Sw, N_2 are all card-carrying Uranusian agents. Attempting to muddle the hysterical record with their lies about when the Hollow Earth rang like a gong!

The Internet/Utube Truth is the wars between the Marsupials and and the Dionaea devastated the inner planets of the Solar System.

The combatants smushed the Moon into the Earth to prepare it for colonization. They did not appreciate that the Earth's surface was covered in Dino poop.

The Moon, consisting of green cheese, bounced off into it's present orbit. The blow literally turned the Hollow Earth inside out! Inside we'll find the dinosaurs being ridden by the Atlantean and Lemurian demi-godsods.

And that's the Absolute Truth cause here it is... Right in front of you, posted on the Internet and plagiarized from a multitude of ancient holy comicbooks... So Believe or suffer the deistic-level wrath of the Flying Tentacle Monster fling thundermugs at you from outer space!
Whydening Gyre
5 / 5 (7) Nov 12, 2017
The Uranus Conspiracy strikes again! O1, Kp, Sw, N_2 are all card-carrying Uranusian agents. Attempting to muddle the hysterical record with their lies about when the Hollow Earth rang like a gong!

...

The Moon, consisting of green cheese, bounced off into it's present orbit. The blow literally turned the Hollow Earth inside out! Inside we'll find the dinosaurs being ridden by the Atlantean and Lemurian demi-godsods.

And that's the Absolute Truth cause here it is... Right in front of you, posted on the Internet and plagiarized from a multitude of ancient holy comicbooks... So Believe or suffer the deistic-level wrath of the Flying Tentacle Monster fling thundermugs at you from outer space!

Wow. l'll have some of whatever he's smokin'...
Steelwolf
5 / 5 (2) Nov 12, 2017
Ya WG, sure ain't Nyborg!

REALLY need a Sarcasm Font, and way to apply!
TheGhostofOtto1923
5 / 5 (1) Nov 12, 2017
@TGO, SW: You are joking since you do not present evidence
How about a huge freeking crater, 1000s of dead species, and marsupials the size of cows? And of course us.
In addition, TGO, outcomes of processes in nature can obviously not be 'designed', that is what complex agents like humans are described doing
Well yeah it's aliens dude. That little machine brain buried somewhere in the asteroid belt that makes sure life in this system turns out right. The one that blew up planet thats now the asteroid belt.

Why? Who knows? Machines need a reason to get up in the morning too ya know.

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