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Were flying reptiles too large to fly?

The following is from the U.K. Telegraph

They carried away Raquel Welch in One Million Years BC and were ferocious in the Jurassic Park series of films.

But now it seems pterodactyls, the terror of the prehistoric skies, may have struggled to get off the ground.

The new research claims that the ancient reptiles, which could grow to the size of small aeroplanes, were too heavy to fly — even with their massive wings.

The problem, according to a leading scientist, is that they could not flap fast enough to create the thrust to keep their enormous bulk airborne.

This is a well-known problem for paleontologists, that recently made the “news” again. Birds can fly because they have lighter bones than most mammals and are light enough to create the momentum to take off from the earth with their wings. Flying reptiles — which were related to, but in a different class than dinosaurs — were so massive that the mechanics of pterosaur flight are not completely understood. But it is equally unlikely that this group of animals was not capable of powered flight.

The problem vanishes if it is proposed that the atmosphere at this time had a higher barometric pressure, being several times thicker or more “soupy” than it is today. In fact, this helps to explain the hugeness of nature in general — how the atmosphere could support giant ferns, plants, trees, insects, dinosaurs, and of course, pterosaurs — during this era.

Implications For Radiometric Dating

The dinosaur era — spanning 300 million years from 350 to 50 million years ago, the Triassic, the Jurassic and the Cretaceous — commenced with an explosion of huge and prolific plant forms. At the start of the Triassic period coal is noticeable by its absence throughout the world. This is known as the “coal gap.” Most of the coal and fossil fuel of the planet is thought to have been formed after the beginning of the Triassic period. During this era, the entire planet existed in a tropical climate. Huge lush rain forests and swamps supported huge insect and animal forms. It is further thought that warm blooded animals did not come on the scene until the planet cooled.

But this theory of a dense atmosphere planet has huge implications for radiometric dating models. Carbon-14 dating relies on the presupposition that the amount of radiation entering the earth’s atmosphere has been fairly constant over the time period being studied. Potassium-argon dating and uranium-lead dating is thought to be more stable than this and the formation of these isotopes are not dependent on cosmic rays. However, it is known that the effect of cosmic rays bombarding these isotopes can produce an an acceleration or deceleration of decay.

If we accept the “super-pressure tropical atmosphere hypothesis” there would be a significantly lower amount of radioactive material and a higher rate of radioactive decay since the sun’s radiation was hindered by the higher moisture environment of the earth’s protective shield. The resulting radiometric dating models would yield dates much higher than the actual age if this is not taken into account.

The mistake is to assume that the amount of cosmic radiation entering the earth’s atmosphere has been constant since the age of dinosaurs. This would have its most immediate effect on Carbon-14 dating, which would affect mainly recent archaeological finds now dated at less than 70,000 years. For the purpose of dating flying reptile fossils, potassium argon and uranium-lead dating is used. The effect of the sun on these radioacative isotopes is more complicated to describe, but the interaction of cosmic rays with the earth’s magnetic field has been shown to have an effect on the enrichment and rate of decay of potassium-argon and uranium-lead.

Without assuming the Genesis pre-flood earth model proposed by many creationists, I’d like to see some paleontologists do a recalibrated study of fossils based on various atmosphere models that differ from the constant model now assumed. The hypothesis ought to be considered that the dinosaur era was closer to us in time than is now proposed.

Comments

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!!!!!!!!!!Great Post!!!!!!!!

Posted by  Anonymous on 10/04/2009 07:46 AM #

Textile Help

Abortion Clinic 911 Calls (DVD)

Exposes the Dangers of Abortion to Women!

These shocking eyewitness accounts expose the dangers of abortion not only to unborn children, but to the health and lives women as well. An antidote to the smokescreens of the liberal media, these short clips show what really happens in and around abortion clinics.

Although the content is emotionally gut-wrenching, these videos have been used in church seminars and small groups to educate Christians on the abortion issue and to lead people toward a pro-life position. Contains 2 hours and 40 minutes of materials that can be shown separately.

Watch these pro-life videos on-line.

“These videos helped change my mind from pro-choice to pro-life. Your videos are what did it for me. I will be walking in next year’s March For Life in San Francisco.” — A. Jackson, California

“I was going to have an abortion until I saw your video. Praise Jesus!”
— M. Drew, YouTube Commenter

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(We accept all major credit cards and PayPal.)

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The Real Jesus: A Defense of the Historicity and Divinity of ChristThe Real Jesus: A Defense of the Historicity and Divinity of Christ (DVD)

Who is the Real Jesus?

Ever since the dawn of modern rationalism, skeptics have sought to use textual criticism, archeology and historical reconstructions to uncover the “historical Jesus” — a wise teacher who said many wonderful things, but fulfilled no prophecies, performed no miracles and certainly did not rise from the dead in triumph over sin.

Over the past 100 years, however, startling discoveries in biblical archeology and scholarship have all but vanquished the faulty assumptions of these doubting modernists. Regrettably, these discoveries have often been ignored by the skeptics as well as by the popular media. As a result, the liberal view still holds sway in universities and impacts the culture and even much of the church.

The Real Jesus explodes the myths of these critics and the movies, books and television programs that have popularized their views. Presented in ten parts — perfect for individual, family and classroom study — viewers will be challenged to go deeper in their knowledge of Christ in order to be able to defend their faith and present the truth to a skeptical modern world – that the Jesus of the Gospels is the Jesus of history — “the same yesterday, today and forever” (Hebrews 13:8). He is the real Jesus.

Speakers include: George Grant, Ted Baehr, Stephen Mansfield, Raymond Ortlund, Phil Kayser, David Lutzweiler, Jay Grimstead, J.P. Holding, and Eric Holmberg.

Ten parts, over two hours of instruction!

Running Time: 130 minutes

$19.95 — ORDER NOW!

(We accept all major credit cards and PayPal.)

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Massacre of Innocence (DVD)

Exposing The Occult Roots of Abortion

This presentation looks at the spiritual roots of abortion and exposes the myths surrounding child killing. Little known historical facts about abortion and how they relate to modern feminism are presented logically and accurately. Has been effective in converting many to a pro-life position.

Massacre of Innocence goes where no pro-life presentation has gone before in “tearing the lid off abortion” to reveal the spiritual realities we must battle if we will bring an end to this crime. The presentation is absorbing, fast-paced, informative and incredibly devastating to any attempt to justify abortion.

“… an extraordinary statement … a powerfully articulate presentation about what abortion really means, and why a great and moral nation like the United States must not allow the slaughter to continue.”
— Congressman Robert K. Dornan

Running time: 85 minutes

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Go Stand Speak (DVD)

With “preaching to the lost” being such a basic foundation of Christianity, why do many in the church seem to be apathetic on this issue of preaching in highways and byways of towns and cities?

Is it biblical to stand in the public places of the world and proclaim the gospel, regardless if people want to hear it or not?

Does the Bible really call church pastors, leaders and evangelists to proclaim the gospel in the public square as part of obedience to the Great Commission, or is public preaching something that is outdated and not applicable for our day and age?

These any many other questions are answered in this documentary.

$19.95 — ORDER NOW!

(We accept all major credit cards and PayPal.)

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The Silent Scream (DVD) Eight Languages

“When the lives of the unborn are snuffed out, they often feel pain, pain that is long and agonizing.” – President Ronald Reagan to National Religious Broadcasters Convention, January 1981

Ronald Reagan became convinced of this as a result of watching The Silent Scream – a movie he considered so powerful and convicting that he screened it at the White House.

The modern technology of real-time ultrasound now reveals the actual responses of a 12-week old fetus to being aborted. As the unborn child attempts to escape the abortionist’s suction curette, her motions can be seen to become desperately agitated and her heart rate doubles. Her mouth opens – as if to scream – but no sound can come out. Her scream doesn’t have to remain silent, however … not if you will become her voice. This newly re-mastered version features eight language tracks and two bonus videos.

“…a high technology “Uncle Tom’s Cabin” arousing public opinion just as Harriet Beecher Stowe’s 1852 antislavery novel ignited the abolitionist movement.” – Sen. Gordon Humphrey, Time Magazine

Languages: English, Spanish, French, South Korean, Chinese, Russian, Portuguese, Japanese

Running Time: 28 minutes

$17.95 — ORDER NOW!

(We accept all major credit cards and PayPal.)

Click here for more information

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