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Cambrian explosion

Cambrian explosion
The Cambrian explosion has generated extensive scientific debate. The seemingly rapid appearance of fossils in the “Primordial Strata” was noted as early as the 1840s,[14] and in 1859 Charles Darwin discussed it as one of the main objections that could be made against the theory of evolution by natural selection.[15] The long-running puzzlement about the appearance of the Cambrian fauna, seemingly abruptly and from nowhere, centers on three key points: whether there really was a mass diversification of complex organisms over a relatively short period of time during the early Cambrian; what might have caused such rapid change; and what it would imply about the origin of animal life. Interpretation is difficult due to a limited supply of evidence, based mainly on an incomplete fossil record and chemical signatures remaining in Cambrian rocks. Key Cambrian explosion events Gaskiers glaciationArchaeonassa-type trace fossils History and significance[edit] Dating the Cambrian[edit] = Basal node Related:  Thinking ToolsCambrian Period: 542–488.3 mya

Was National Geographic WRONG? Despite the fact that modern evolutionists have rejected almost everything Darwin believed, National Geographic makes the claim that Darwin was right. In big letters on pages 2 and 3, National Geographic asks the question, “Was Darwin wrong?” Then, in letters that take up the entire top half of page 4, they answer, “No. the evidence for evolution is overwhelming.” So, let’s look at what that evidence is. Just a Theory They began their article by defending against the “evolution is just a theory” argument. The fact that National Geographic began their article with this topic says more about National Geographic than it does about evolution. We would like you to ask yourself, “What does this tell us about National Geographic?” The second observation, which we would like to submit for your consideration, is that people tend to think that other people fear the same things they fear. Let’s not dwell too much on this point. National Geographic is right about two things. Morphology Embryology

Cambrian Explosion Most major animal groups appear for the first time in the fossil record some 545 million years ago on the geological time scale in a relatively short period of time known as the Cambrian explosion. Of great worry to Darwin, the explanation of this sudden, apparent explosion persists as a source of numerous major debates in paleobiology. While some scientists believe there was indeed an explosion of diversity (the so-called punctuated equilibrium theory elaborated by Nils Eldredge the late Stephen J. The theory of the Cambrian Explosion holds that, beginning some 545 million years ago, an explosion of diversity led to the appearance over a relatively short period of 5 million to 10 million years of a huge number of complex, multi-celled organisms. appeared in the Cambrian only to rapidly disappear. The Cambrian Explosion is the outcome of changes in environmental factors leading to changes in selective pressures, in turn leading to adaptive diversification on a vast scale. References:

You're a Criminal in a Mass Surveillance World – How to Not Get Caught Sometimes you just get lucky. I was in Amsterdam when the Snowden story broke. CNN was non-stop asking politicians and pundits, “Is Edward Snowden a traitor?” The Snowden story hit me upon my return from – of all places on earth – the Secret Annex of the Anne Frank House. The “Anne Frank House” — then and now I say I was lucky because the cosmic unlikeliness of my Secret Annex visit coinciding with Snowden’s mass surveillance revelations led to some revelations of my own. It turns out we’re all criminals in a mass surveillance world. What Makes a Criminal? Merriam-Webster defines crime as “activity that is against the law.” The law as a whole is an ever-expanding collection of rules that politicians (“lawmakers”) decree and occasionally repeal. Simply put, laws are the rules politicians make up, and criminals are people who break them. It floored me to realize: Anne Frank was, in fact, a criminal. We can express outrage at the designation since Anne did nothing wrong. The Secret Annex Miep

Link to article on Spartobranchus tenuis Evolution: Library: The Cambrian Explosion For most of the nearly 4 billion years that life has existed on Earth, evolution produced little beyond bacteria, plankton, and multi-celled algae. But beginning about 600 million years ago in the Precambrian, the fossil record speaks of more rapid change. First, there was the rise and fall of mysterious creatures of the Ediacaran fauna, named for the fossil site in Australia where they were first discovered. Some of these animals may have belonged to groups that survive today, but others don't seem at all related to animals we know. Then, between about 570 and 530 million years ago, another burst of diversification occurred, with the eventual appearance of the lineages of almost all animals living today. It's important to remember that what we call "the fossil record" is only the available fossil record. It has long been suspected that the sparseness of the pre-Cambrian fossil record reflects these two problems. Internal, genetic factors were also crucial.

DARWIN WAS WRONG If a fair maiden kisses a frog which instantly changes into a handsome prince, we would call it a fairy tale. But if the frog takes 40 million years to turn into a prince, we call it evolution. Time is the evolutionist's magic wand. Fairy tales come in many forms! We often hear that science has proved Darwin's theory of evolution. Darwin's theory of evolution says that over millions of years simple life forms (one celled creatures) slowly evolved into complex life forms (fish), and that one kind of animal evolved into another kind (ape to man).The creation model, on the other hand, says that all life forms were created in six, 24 hour days. Darwin taught that many little changes over a long period of time will add up to big changes. It is a well guarded fact that many evolutionists rejected Darwin's theory of evolution over 20 years ago. Evolutionists tell us in the new "punctuationalist" theory, that, in effect, a lizard laid an egg and out pops a baby bird. So Good-bye Lucy!

Evolution News & Views: Cambrian Fossils Still a Dilemma for Darwinism 100 Years After Discovery of Burgess Shale Exactly one hundred years ago leading American paleontologist Charles Doolittle Walcott (right) was hiking along Burgess Pass in the Canadian Rockies when he found a slab of shale containing fossil crustaceans. His interest piqued, Wolcott made return trips to the Burgess Shale in the following years where he ultimately collected tens of thousands of fossils. Many of these fossils were extraordinarily well-preserved, and they were mysterious. Darwin himself was aware of this problem in his own day, writing that the lack of fossil evidence for the evolution of Cambrian trilobites "must at present remain inexplicable; and may be truely urged as a valid argument against the views here entertained." The Cambrian seas are now being brought back to life in a new video from Illustra Media titled "Darwin's Dilemma: The Mystery of the Cambrian Fossil Record," set to be released next month.

The Top 100 Documentaries We Can Use To Change The World A more beautiful, just and sustainable world is possible. Take this library and use it to inspire global change! Originally featured on Films For Action Documentaries have an incredible power to raise awareness and create transformative changes in consciousness both at the personal and global levels. Over the last 8 years, we’ve watched hundreds of social change documentaries and cataloged the best of them on the site. There’s now so many that we realized we needed to filter this down even further. All of the films have been selected because they are either free to watch online, or can be rented online. Did we miss anything really good?

Burgess Shale The Burgess Shale Formation, located in the Canadian Rockies of British Columbia, is one of the world's most celebrated fossil fields.[2] It is famous for the exceptional preservation of the soft parts of its fossils. At 505 million years (Middle Cambrian) old,[3] it is one of the earliest fossil beds containing soft-part imprints. The rock unit is a black shale and crops out at a number of localities near the town of Field in Yoho National Park and the Kicking Horse Pass. Another outcrop is in Kootenay National Park 42 km to the south. History and significance[edit] The Burgess Shale was discovered by palaeontologist Charles Walcott on 30 August 1909,[4] towards the end of the season's fieldwork.[5] He returned in 1910 with his sons, daughter, and wife, establishing a quarry on the flanks of Fossil Ridge. With Parks Canada and UNESCO recognising the significance of the Burgess Shale, collecting fossils became politically more difficult from the mid-1970s. Geological setting[edit]

Cows of the Cretaceous The hadrosaurids, or duck-billed dinosaurs, were among the most successful plant-eating dinos to roam the earth. They ranged widely in North America, Europe, and Asia during the Upper Cretaceous period, about 100 million years ago to 65 million years ago. What was the secret to their success? A new study of hadrosaurid teeth finds that they were among the most sophisticated chompers ever known, capable of grinding and slicing like a prehistoric Veg-O-Matic. Scientists already knew that duckbill teeth made them formidable chewing machines. To get a more incisive look at how duckbill teeth tackled these abrasive plant foods, a team of paleontologists and engineers sliced up some teeth from the well-known hadrosaurid Edmontosaurus, using nearly 70-million-year-old specimens from the collections of the American Museum of Natural History in New York City. Their results, which they publish in tomorrow's issue of Science, go a long way toward explaining the duckbills' success.

Creationism From Conservapedia Creationism is the belief that the earth and universe and the various kinds of animals and plants were created by God or some other supreme being. Those that hold the views of Creationism are referred to as Creationists.[1] Biblical creationism is primarily based on: the compelling testimony provided by God's wondrous creation; the historical and prophetic evidence supporting the Bible; religious belief and on the scientific evidence provided through creation science. Biblical creationism, which includes the idea that man is created in the image of God, has profoundly affected Western Civilization in a positive way. Creation Ministries International, a leading biblical creation organization, declared: Within creationism in the Abrahamic religions, there are various ideas. Creationism and Controversy Creationism and Intelligent Design Believers in the Abrahamic faiths who hold to creationism believe that the natural world has been designed by God. Recommended books J.D.