The Earth Has Experienced Five Mass Extinctions

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Cosmos: The big five mass extinctions

Biologists suspect we’re living through the sixth major mass extinction. Earth has witnessed five, when more than 75% of species disappeared. Palaeontologists spot them when species go missing from the global fossil record, including the iconic specimens shown here. “We don’t always know what caused them but most had something to do with rapid climate change”, says Melbourne Museum palaeontologist Rolf Schmidt.

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WNU Editor: Bottom line .... 5 major extinction events.

A Yellowstone Volcano Eruption In 2014?

This map from the U.S. Geological Service shows the range of the volcanic ash that was deposited after the biggest of the Yellowstone National Park eruptions around 2.1 million years ago. "These eruptions left behind huge volcanic depressions called “calderas” and spread volcanic ash over large parts of North America," it said. "If another large caldera-forming eruption were to occur at Yellowstone, its effects would be worldwide. Thick ash deposits would bury vast areas of the United States, and injection of huge volumes of volcanic gases into the atmosphere could drastically affect global climate. Fortunately, the Yellowstone volcanic system shows no signs that it is headed toward such an eruption in the near future. In fact, the probability of any such event occurring at Yellowstone within the next few thousand years is exceedingly low."

Yellowstone Volcano Eruption in 2014? Are Animals Fleeing Park As ‘An Alert’? -- Zachary Stieber, Epoch Times

A number of bloggers are posting videos that show bison and other animals allegedly leaving Yellowstone National Park, prompting theories that as earthquakes ramp up the seismic activity will set off the Yellowstone supervolcano.

Two of the main bloggers behind the discussion stress that there’s no way to know when the supervolcano will go off but note that the 4.8 magnitude earthquake that hit on March 30 seemed to set off a reaction from the animals, who are moving for a reason.

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My Comment: Here is an easy prediction .... if such an eruption should occur .... it will be the number one news story for all of us for a very very very long time.

Fears Of A Supervolcano Erupting Sooner Rather Than Later Are Being Raised

Eruption: Supervolcanoes with the power to destroy human civilisations may build up a deadly head of steam far faster than scientists believed

Supervolcanoes With Power To 'Destroy Civilisation' Explode Far More Rapidly Than Scientists Had Believed - And One Could Be Bubbling Under U.S. Right Now -- Daily Mail

* Most deadly event that can hit Earth short of asteroid
* Scientists believed they took 100,000 years to build up
* Instead, figure could be just hundreds
* Supervolcano believed to be simmering under Yellowstone in U.S.

A 'supervolcano' eruption is the most catastrophic natural disaster that can hit our planet, short of an asteroid impact - and now scientists believe they may build up a deadly head of steam far faster than we thought.

Instead of the process taking hundreds of thousands of years, it could take just hundreds.

The news could be bad for the US, where a supervolcano is said to be simmering beneath Yellowstone National Park. If it erupted, two thirds of the country could be rendered uninhabitable.

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My Comment: Such an event will .... to put it mildly .... change everything.

It Took Ten Million Years To Recover From Earth's Greatest Mass Extinction

New research reveals that it took some 10 million years for Earth to recover from the greatest mass extinction of all time, some 250 million years ago. (Credit: © byheaven / Fotolia)

It Took Earth Ten Million Years to Recover from Greatest Mass Extinction -- Science Daily

ScienceDaily (May 27, 2012) — It took some 10 million years for Earth to recover from the greatest mass extinction of all time, latest research has revealed.

Life was nearly wiped out 250 million years ago, with only 10 per cent of plants and animals surviving. It is currently much debated how life recovered from this cataclysm, whether quickly or slowly.

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My Comment: Only 10 million years?

Rate Of Species Disappearance Is Accelerating

History's Normal Rate Of Species Disappearance Is Accelerating, Scientists Say -- McClatchy News

PHILADELPHIA — Biologist E.O. Wilson once pondered whether many of our fellow living things were doomed once evolution gave rise to an intelligent, technological creature that also happened to be a rapacious carnivore, fiercely territorial and prone to short-term thinking.

We humans can be so destructive that some scientists believe we've now triggered a mass extinction - one that in several hundred years will rival the asteroid impact that killed the dinosaurs.

In some places, a mass extinction is already under way. Haiti, a "hotspot" for plant and animal diversity, may be closest to ecological collapse.

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Mass Extinction Caused by Deadly 'Earth Burp'

The Northern Calcareous Alps, where scientists found evidence of a giant, killing "burp" of methane emitted hundreds of millions of years ago.

From FOX News:

A massive, long-ago extinction was once thought to have been caused by a destructive wave of volcanic activity. Scientists now point their fingers at another culprit.

A giant, deadly “Earth burp.”

Micha Ruhl and researchers from the Nordic Center for Earth Evolution at the University of Copenhagen in Denmark have found that the mass extinction of half of Earth’s marine life over 200 million years ago was likely the result of a giant release of carbon methane in the atmosphere.

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Are We Witnessing The 6th Great Mass Extinction?

Will 75 percent of Earth's species go the way of the dodo?
CREDIT: Dreamstime

Humans On Verge Of Causing 6th Great Mass Extinction -- Live Science

Are humans causing a mass extinction on the magnitude of the one that killed the dinosaurs?

The answer is yes, according to a new analysis — but we still have some time to stop it.

Mass extinctions include events in which 75 percent of the species on Earth disappear within a geologically short time period, usually on the order of a few hundred thousand to a couple million years. It's happened only five times before in the past 540 million years of multicellular life on Earth. (The last great extinction occurred 65 million years ago, when the dinosaurs were wiped out.) At current rates of extinction, the study found, Earth will enter its sixth mass extinction within the next 300 to 2,000 years.

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My Comment: The data speaks for itself .... we are experiencing the 6th Great Mass Extinction

What If To Do If A Huge Asteroid Was Going To Slam Into Earth?

City Tech student Thinh Lê with the apparatus he built to measure the optical transmission of meteorite samples. (Credit: Michele Forsten)

Asteroid Deflection: What If A Huge Asteroid Was Going To Slam Into Earth? -- Science Daily

ScienceDaily (Jan. 31, 2011) — So you think global warming is a big problem? What could happen if a 25-million-ton chunk of rock slammed into Earth? When something similar happened 65 million years ago, the dinosaurs and other forms of life were wiped out.

"A collision with an object of this size traveling at an estimated 30,000 to 40,000 mile per hour would be catastrophic," according to NASA researcher and New York City College of Technology (City Tech) Associate Professor of Physics Gregory L. Matloff. His recommendation? "Either destroy the object or alter its trajectory."

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My Comment: A massive asteroid strike on the earth .... that for sure will make my day.

Volcanoes Wiped out Neanderthals, New Study Suggests

The Semeru volcano in Indonesia. New research suggests that climate change following massive volcanic eruptions drove Neanderthals to extinction and cleared the way for modern humans to thrive in Europe and Asia. (Credit: iStockphoto)

From Science Daily:

ScienceDaily (Oct. 7, 2010) — New research suggests that climate change following massive volcanic eruptions drove Neanderthals to extinction and cleared the way for modern humans to thrive in Europe and Asia.

The research, led by Liubov Vitaliena Golovanova and Vladimir Borisovich Doronichev of the ANO Laboratory of Prehistory in St. Petersburg, Russia, is reported in the October issue of Current Anthropology.

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What Killed The Mammoths? Alien Nanodiamonds May Hold The Answer

Wooly Mammoth Did nanodiamonds mean death for this mammoth and all his friends? Depends on which study you believe. Wikimedia Commons

From Popular Science:

Do nanodiamonds prove an asteroid impact killed off North America's massive mammals 13,000 years ago? It depends on which scientist you ask.

A pair of studies published in the last month offer competing theories about whether an extraterrestrial object killed megafauna like woolly mammoths and sabre-toothed cats, along with the Clovis culture of North American human settlers.

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Mass Extinction Threat: Earth On Verge of Huge Reset Button?

From Live Science:

Mass extinctions have served as huge reset buttons that dramatically changed the diversity of species found in oceans all over the world, according to a comprehensive study of fossil records. The findings suggest humans will live in a very different future if they drive animals to extinction, because the loss of each species can alter entire ecosystems.

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Top 5 Ways The Universe Could Wipe Out Humankind

From Popular Mechanics:

The Universe looks like a pretty tranquil place to live, doesn't it? During the day the sun shines steadily, and at night the heavens are reassuring and unchanging.

Dream on. The Universe is filled to the brim with dangerous, nasty things, all jostling for position to be the one to wipe us off the face of the planet. Happily for us, they're all pretty unlikely—how many people do you know who have died by proton disintegration?—but if you wait long enough, one of them is bound to get us.

But which one?

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Double Space Strike 'Caused Dinosaur Extinction'

From The BBC:

The dinosaurs were wiped out 65 million years ago by at least two space impacts, rather than a single strike, a new study suggests.

Previously, scientists had identified a huge impact crater in the Gulf of Mexico as the event that spelled doom for the dinosaurs.

Now evidence for a second impact in Ukraine has been uncovered.

This raises the possibility that the Earth may have been bombarded by a whole shower of space rocks.

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My Comment: Regardless if there was one or more asteroid strikes .... it was a bad day for the dinosaurs when the first one happened.

Living World: The Shape Of Life To Come

Rapid climate change may leave polar bears high and dry
(Image: Ingrid Visser/SplashdownDirect/Rex Features)

From New Scientist:

A 3-metre-tall kangaroo; the car-sized armadillos called glyptodons; giant lemurs and elephant birds from Madagascar. Almost as soon as humans evolved, we began killing off other species, not just by hunting but also by changing the landscape with fire.

Now we are altering the planet more rapidly and profoundly than ever, and much of the diversity produced by half a billion years of evolution could be lost in the next few centuries. We are triggering a mass extinction that could be as severe as the one that ended the reign of the dinosaurs.

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Dinosaurs 'Killed Off By A Sudden Drop In Temperature And NOT By A Comet'

Evidence? This Jurassic ammonite discovered in Svalbard, Norway reveals the sudden drop in temperature which may have contributed to the extinction of the dinosaurs, scientists believe.

From The Daily Mail:

Dinosaurs were wiped off the face of the Earth by a sudden drop in temperature and not by a comet striking the planet, scientists claimed today.

Researchers studying fossils in Norway have discovered that the world's seas plummeted 9C from 13C to just 4C around 137million years ago.

They believe this was caused by a sudden change in the Atlantic Gulf Stream - a phenomenon many experts fear is about to happen again.

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Supervolcano: How Humanity Survived Its Darkest Hour

From New Scientist:

THE first sign that something had gone terribly wrong was a deep rumbling roar. Hours later the choking ash arrived, falling like snow in a relentless storm that raged for over two weeks. Despite being more than 2000 kilometres from the eruption, hominins living as far away as eastern India would have felt Toba's fury.

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Scientists Explore Origins Of 'Supervolcanoes' On The Sea Floor: Ancient Goliaths Blamed For Multiple Mass Extinctions

JOIDES Resolution departing from Yokohama, Japan, on the Shatsky Rise expedition. (Credit: John Beck, IODP/TAMU)

From Science Daily:

ScienceDaily (Apr. 10, 2010) — "Supervolcanoes" have been blamed for multiple mass extinctions in Earth's history, but the cause of their massive eruptions is unknown.

Despite their global impact, the eruptions' origin and triggering mechanisms have remained unexplained. New data obtained during a recent Integrated Ocean Drilling Program (IODP) expedition in the Pacific Ocean may provide clues to unlocking this mystery.

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Climate Change Disaster Killed Off The 'Terrible Lizards' And Helped Dinosaurs To Rule The Earth

Changes: Dinosaurs came to rule the world as a direct result of a
mass extinction similar to the one that killed them off

From The Daily Mail:

Dinosaurs came to rule the world as a direct result of a mass extinction similar to the one that killed them off and allowed mammals to take over the planet, research has revealed.

History was repeating itself when a climate change disaster ended the 200million year reign of the 'terrible lizards', evidence suggests.

A massive asteroid impact is believed to have altered the world's climate and wiped out the dinosaurs, giving mammals the opportunity they had been waiting for to flourish.

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Humans Driving Extinction Faster Than Species Can Evolve, Say Experts

The IUCN lists west African giraffes as an endangered species. Conservationists say the rate of new species is slower than diversity loss. Photograph: Graeme Robertson

From The Guardian:

Conservationists say rate of new species slower than diversity loss caused by the destruction of habitats and climate change.

For the first time since the dinosaurs disappeared, humans are driving animals and plants to extinction faster than new species can evolve, one of the world's experts on biodiversity has warned.

Conservation experts have already signalled that the world is in the grip of the "sixth great extinction" of species, driven by the destruction of natural habitats, hunting, the spread of alien predators and disease, and climate change.

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Asteroid Killed Off The Dinosaurs, Says International Scientific Panel

An artist's rendering of the moment of impact when an enormous space rock struck the Yucatán peninsula at the end of the Cretaceous Period. (Credit: Don Davis, NASA)

From Science Daily:

Science Daily (Mar. 4, 2010) — The Cretaceous-Tertiary mass extinction, which wiped out the dinosaurs and more than half of species on Earth, was caused by an asteroid colliding with Earth and not massive volcanic activity, according to a comprehensive review of all the available evidence, published in the journal Science.

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