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Evolution Defenders

A group for Secularists, Agnostics, Atheists, etc... who believe we should keep the poison of creationism and Intelligent Design OUT of public school science classrooms.

Location: #science
Members: 62
Latest Activity: Feb 17

ID conspiracy proof... written by the proponents of ID themselves!!!

The Formerly-Secret "Wedge Document" written by the Intelligent Designers themselves. Proof that ID is creationism in disguise.
The Wedge Document.pdf
Also find this document at http://ncseweb.org/

This document was key evidence in the Dover, PA trial featured in "Judgement Day: Intelligent Design on Trial."

Discussion Forum

Why Being Human Makes Evolution Hard to Understand

Started by Neal. Last reply by Tom Sarbeck Oct 19, 2016. 5 Replies

Being human makes for foolishness.Cameron M. SmithVolume 37.6, November/December 2013Our difficulty accepting evolution isn’t just because some religions oppose it or that it is complicated—it isn’t.…Continue

Tags: to, understand, atheist, universe, hard

Homo erectus may have doodled on shellfish

Started by Davy. Last reply by doone Dec 6, 2014. 1 Reply

Early humans from Java used shells for tools and engraving long before Homo sapiens did, new research suggests.The findings, published today in the journal …Continue

Tags: University, National, Museum, of, Australia.

Evolution Notes and News

Started by doone. Last reply by archaeopteryx Jan 8, 2014. 74 Replies

Date of earliest animal life reset by 30 million years…Continue

Tags: News, and, Notes, Evolution

Promoting Evolution Through Cartoons.....

Started by Neo Jul 8, 2013. 0 Replies

I have been watching Cartoon Network lately. Mainly because adult TV has gotten really boring, but I also still love cartoons. One day I was watching this one show called "The World of Gumball" and…Continue

Comment Wall

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Comment by Stephen on January 20, 2017 at 11:18pm

I suspect if I was tested they would find a higher percentage of Neanderthal in my genome. haha

Comment by Mrs.B on January 20, 2017 at 11:15pm

I wish I had the money to get myself tested.

Comment by Stephen on January 20, 2017 at 11:09pm

John Anthony Capra at the Vanderbilt University biobank freezer in Nashville. The freezer can store some 400,000 DNA samples.Credit Joe Buglewicz for The New York Times

John Anthony Capra at the Vanderbilt University biobank freezer in Nashville. The freezer can store some 400,000 DNA samples.Credit Joe Buglewicz for The New York Times

What Did Neanderthals Leave to Modern Humans? Some Surprises

Geneticists tell us that somewhere between 1 and 5 percent of the genome of modern Europeans and Asians consists of DNA inherited from Neanderthals, our prehistoric cousins.

At Vanderbilt University, John Anthony Capra, an evolutionary genomics professor, has been combining high-powered computation and a medical records databank to learn what a Neanderthal heritage — even a fractional one — might mean for people today.

We spoke for two hours when Dr. Capra, 35, recently passed through New York City. An edited and condensed version of the conversation follows.

Q. Let’s begin with an indiscreet question. How did contemporary people come to have Neanderthal DNA on their genomes?

A. We hypothesize that roughly 50,000 years ago, when the ancestors of modern humans migrated out of Africa and into Eurasia, they encountered Neanderthals. Matings must have occurred then. And later.

One reason we deduce this is because the descendants of those who remained in Africa — present day Africans — don’t have Neanderthal DNA.

Read more= read:https://www.nytimes.com/2017/01/20/science/john-anthony-capra-neand...

Comment by Stephen on January 6, 2017 at 1:04am

Dawkins’s answer to the Edge question: the genome as palimpsest

As I posted yesterday, a lot of contributors gave their answers to the 2017 annual Edge Question, “What scientific term or concept ought to be more widely known?” (See all responses here.) In the last 24 hours Richard Dawkins has weighed in with his answer, “The genetic book of the dead,” which involves reverse-engineering our DNA sequences to reconstruct the ancestral environments of living species. While Dawkins has discussed this before, most notably in Unweaving the Rainbow, not everyone’s read that book. It’s worth considering that an organism’s genome may be a palimpsest of its ancestry, which in turn reflects in part the environments to which those ancestors were adapted.

You can read Richard’s piece for yourself; I’ll give one brief excerpt:

Given a key, you can reconstruct the lock that it fits. Given an animal, you should be able to reconstruct the environments in which its ancestors survived. A knowledgeable zoologist, handed a previously unknown animal, can reconstruct some of the locks that its keys are equipped to open. Many of these are obvious. Webbed feet indicate an aquatic way of life. Camouflaged animals literally carry on their backs a picture of the environments in which their ancestors evaded predation.

But most of the keys that an animal brandishes are not obvious on the surface. Many are buried in cellular chemistry. All of them are, in a sense which is harder to decipher, also buried in the genome. If only we could read the genome in the appropriate way, it would be a kind of negative imprint of ancient worlds, a description of the ancestral environments of the species: the Genetic Book of the Dead.

Naturally the book’s contents will be weighted in favour of recent ancestral environments. The book of a camel’s genome describes recent milennia in deserts. But in there too must be descriptions of Devonian seas from before the mammals’ remote ancestors crawled out on the land. The genetic book of a giant tortoise most vividly portrays the Galapagos island habitat of its recent ancestors; before that the South American mainland where its smaller ancestors thrived. But we know that all modern land tortoises descend earlier from marine turtles, so our Galapagos tortoise’s genetic book will describe somewhat older marine scenes. But those marine ancestral turtles were themselves descended from much older, Triassic, land tortoises.  And, like all tetrapods, those Triassic tortoises themselves were descended from fish. So the genetic book of our Galapagos giant is a bewildering palimpsest of water, overlain by land, overlain by water, overlain by land.

Read more= read:https://whyevolutionistrue.wordpress.com/2017/01/02/dawkinss-answer...

Comment by Chris on January 5, 2017 at 6:47am

"...This discovery is interesting also because it’s possible that such a thing happened to the ancestors of birds as well which may explain why they have no teeth."

I thought it was because they didn't floss.

Comment by Tom Sarbeck on January 3, 2017 at 11:25pm
So Franky has endorsed the Bang.
The electrical engineers who endorse the Plasma Universe will file his remark where it belongs.
Comment by Mrs.B on January 3, 2017 at 3:01pm

Just saw this story on tv.

Comment by Stephen on January 3, 2017 at 12:39pm

Limusaurus inextricabilis was a dinosaur that lost its teeth during its growth

Limusaurus inextricabilis with the juvenile’s teeth (Image courtesy George Washington University)

An article published in the journal “Current Biology” describes a research on a dinosaur with characteristics similar to birds called Limusaurus inextricabilis. A team of researchers studied 19 specimens ranging from babies to adults discovered in today’s Xinjiang province in China to analyze how they developed teeth and then lost them over time.

Limusaurus inextricabilis was a very small dinosaur with a length that could reach 170 cm (5′ 7″) and a weight that could reach about 15 kg (33 lbs). They belonged to the ceratosaurs (Ceratosauria) group and, while they were a rather ancient and primitive species, had several characteristics similar to those of birds. Ceratosaurs were theropod dinosaurs, just like those that evolved into birds and in some cases even species that are distantly related may show similar characteristics.

The first specimens of Limusaurus inextricabilis were discovered in 2009, at the time only two subadults. The big step forward arrived with the discovery of 17 more specimens of various ages divided into three groups: six were juveniles, ten were subadults with age estimated between 2 and 6 years and one adult. They lived about 159 million years ago, during the Jurassic period.

The study of the teeth showed the most distinctive feature of Limusaurus inextricabilis because the youngest had small sharp teeth while adults and subadults were completely toothless. These differences made the paleontologists believe they had discovered two species of ceratosaurs, so much so that they started describing them separately. However, in the course of their study, they realized that the specimens showed many similarities except for the teeth and concluded that it was a single species that lost their teeth throughout its life.

This is an unprecedented discovery regarding dinosaurs and in general fossil vertebrates. Today similar changes occur in the platypus and in some species of fish and amphibians. However, these are rare cases so the study of Limusaurus inextricabilis is even more important and suggests that these dinosaurs radically changed their diet from adolescence to adulthood.

The analyzes of the fossils, also at isotopic level, indicate that Limusaurus inextricabilis juveniles were probably carnivores or omnivores while the adults were herbivores. This discovery is interesting also because it’s possible that such a thing happened to the ancestors of birds as well which may explain why they have no teeth.

Comment by Stephen on December 29, 2016 at 5:08pm

The Gaps in the God of the gaps theory is getting smaller and smaller.

Comment by Mrs.B on December 17, 2016 at 2:28pm

I don't ''believe'' in evolution either.......I observe it everywhere & I take it as ''fact''.

 
 
 

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