It's official: An asteroid wiped out the dinosaurs

[iggs111]

I know I know....everyone has yahoo news....But the extinction of Dinosaurs has always fascinated me. Must have been one crazy day when this all happened.....Can it happen again?

LONDON (Reuters) – A giant asteroid smashing into Earth is the only plausible explanation for the extinction of the dinosaurs, a global scientific team said on Thursday, hoping to settle a row that has divided experts for decades.

A panel of 41 scientists from across the world reviewed 20 years' worth of research to try to confirm the cause of the so-called Cretaceous-Tertiary (KT) extinction, which created a "hellish environment" around 65 million years ago and wiped out more than half of all species on the planet.

Scientific opinion was split over whether the extinction was caused by an asteroid or by volcanic activity in the Deccan Traps in what is now India, where there were a series of super volcanic eruptions that lasted around 1.5 million years.

The new study, conducted by scientists from Europe, the United States, Mexico, Canada and Japan and published in the journal Science, found that a 15-kilometre (9 miles) wide asteroid slamming into Earth at Chicxulub in what is now Mexico was the culprit.

"We now have great confidence that an asteroid was the cause of the KT extinction. This triggered large-scale fires, earthquakes measuring more than 10 on the Richter scale, and continental landslides, which created tsunamis," said Joanna Morgan of Imperial College London, a co-author of the review.

The asteroid is thought to have hit Earth with a force a billion times more powerful than the atomic bomb at Hiroshima.

Morgan said the "final nail in the coffin for the dinosaurs" came when blasted material flew into the atmosphere, shrouding the planet in darkness, causing a global winter and "killing off many species that couldn't adapt to this hellish environment."

Scientists working on the study analyzed the work of paleontologists, geochemists, climate modelers, geophysicists and sedimentologists who have been collecting evidence about the KT extinction over the last 20 years.

Geological records show the event that triggered the dinosaurs' demise rapidly destroyed marine and land ecosystems, they said, and the asteroid hit "is the only plausible explanation for this."

Peter Schulte of the University of Erlangen in Germany, a lead author on the study, said fossil records clearly show a mass extinction about 65.5 million years ago -- a time now known as the K-Pg boundary.

Despite evidence of active volcanism in India, marine and land ecosystems only showed minor changes in the 500,000 years before the K-Pg boundary, suggesting the extinction did not come earlier and was not prompted by eruptions.

The Deccan volcano theory is also thrown into doubt by models of atmospheric chemistry, the team said, which show the asteroid impact would have released much larger amounts of sulphur, dust and soot in a much shorter time than the volcanic eruptions could have, causing extreme darkening and cooling.

Gareth Collins, another co-author from Imperial College, said the asteroid impact created a "hellish day" that signaled the end of the 160-million-year reign of the dinosaurs, but also turned out to be a great day for mammals.

"The KT extinction was a pivotal moment in Earth's history, which ultimately paved the way for humans to become the dominant species on Earth," he wrote in a commentary on the study.

[PHILLYBIRDS20]

that asteroid wiped out my mattress last weekend.

[Ron Mexico]

Originally Posted by PHILLYBIRDS20

that asteroid wiped out my mattress last weekend.

That was a hemroid not an asteroid.

[PHILLYBIRDS20]

I saw pieces of rock I think it was a Blasteroid

[Windy City Irish]

what color was it?

[iggs111]

lol

[GFootsXtreme]

iggs a good read. i always enjoyed the topic also and it's interesting that what was once a long-shot theory is now the current best analysis

wondering if you ever got into the massive impact in Siberia that also was believed to be from a (can't remember the exact term but a massive iceball of some sort)? really cool documentaries on that one about the investigators and what they found, interviews with those that saw it. amazing stuff

[The Judge]

Originally Posted by iggs111

I know I know....everyone has yahoo news....

Not anymore, I canceled my subscription this morning.

[Sammy the Goose]

[ZoomVT]

Lol

[Gerk]

Gerk and James Cameron vying for film rights

[iggs111]

Originally Posted by The Judge

Not anymore, I canceled my subscription this morning.

stop it, Judge.

[iggs111]

Originally Posted by GFootsXtreme

iggs a good read. i always enjoyed the topic also and it's interesting that what was once a long-shot theory is now the current best analysis

wondering if you ever got into the massive impact in Siberia that also was believed to be from a (can't remember the exact term but a massive iceball of some sort)? really cool documentaries on that one about the investigators and what they found, interviews with those that saw it. amazing stuff

I'm no scientist but how else could these massive creatures just disappeared?? This is the most logical theory if you ask me. Gfoots, yea i know what your talking about. It wiped out like half a million acres of forest I think. Crazy shit

[GFootsXtreme]

Originally Posted by iggs111

I'm no scientist but how else could these massive creatures just disappeared?? This is the most logical theory if you ask me. Gfoots, yea i know what your talking about. It wiped out like half a million acres of forest I think. Crazy shit

I agree completely. Because it was so long ago and nature is so complex though, proving it to a scientists degree of certainty is nearly impossible.

I bring up the 1908 Siberia thing because it's a potentially similar event on a smaller scale. What is astounding about the 1908 event is that there were eyewitness reports, and scientists over the decades that went there and looked in the lakes and surrounding area for clues as to what exactly hit, and where

the basic conclusion is that a (not a meteor, again I don't recall the term but one that is combined with a lot of ice and gases) XXXX blew up IN THE ATMOSPHERE. It didn't strike the ground, instead it exploded above ground and created absolute devastation in some places...and not in others

The trees that were - and were not affected - was the final clue that gave them the very best guess as to what happened.

But if they still aren't 100% sure about an event from 1908, you can see how difficult it is to get to a final conclusion on something from millions of years ago!