Recently in Evolution Category

Not stated is whether they manage to lose weight, nor whether they still get cavities or develop diabetes. But a recent article in Science shows that cockroaches evolved an aversion to glucose after glucose was used for a number of years as a poisoned bait. That is, the cockroaches developed an aversion to the bait rather than a resistance to the poison. The Science article is kind of written in Greek

In response to the anthropogenic assault of toxic baits, populations of the German cockroach have rapidly evolved an adaptive behavioral aversion to glucose (a phagostimulant component of baits).

but The New York Times has a nice summary and notes, almost as a throw-away, that the result might have application to diseases, such as malaria, that are spread by mosquitoes.

Memo to potential trolls: Yes, yes, we know—they are still cockroaches!!

Photograph by Huajin Sun.

Grus japonensis – red-crowned crane. This photograph, which adorns the dust jacket of The World’s Rarest Birds, earned second prize in the “endangered or data-deficient” category of a worldwide photo contest. I will review the book briefly, below the fold.

Note added May 21, 11:00 a.m., MDT: You may see the contest winners here and the winners of a second contest here.

Photograph by Dennis Venema.

Photography contest, Honorable Mention.

Drosera rotundifolia – round-leaved sundew, Fort Langley Bog, British Columbia.

Introgression or genetic exchange between crops and their wild relatives is of broad interest due to concern regarding the escape of transgenes from genetically engineered crops. Many fear the potential deleterious effects of such introgression including decreased fitness or diversity of wild relatives and/or the creation of “superweeds” that are resistant to the current arsenal of herbicides. But there is another side to crop-wild gene exchange. A paper published in the open-access journal PLoS Genetics this week reveals that crop-wild introgression is likely a longstanding and potentially beneficial phenomenon in some agroecosystems. Matthew Hufford, Jeffrey Ross-Ibarra and colleagues describe how introgression from wild relatives has shaped the genome of corn, potentially providing essential adaptations as it spread from a narrow center of domestication into novel environments.

Corn was domesticated in the lowlands of southwest Mexico ~10,000 years ago from a wild grass known as teosinte. A few thousand years later corn colonized the high altitudes of the Mexican Central Plateau. There, it came into contact with a different wild teosinte, one presumably well adapted to the new environment. Both corn and teosinte in the highlands have characteristics such as purple pigmentation and hairy stalks and leaves that are believed to help these plants tolerate the lower temperatures and higher ultra-violet radiation of the highlands. For some time, biologists have been stumped as to whether corn and teosinte obtained these highland adaptations independently or through introgression, with some arguing that the shared characteristics were a good example of maize genes escaping into the wild.

Photograph by Paul Ruggeri.

Photography contest, Honorable Mention.

Loxodonta africana – African elephant. Mud dries on the back of the elephant. The mud in the furrows between the folds remains moist, helping the elephant to keep cool in the heat. The dried mud on the folds helps protect against sunburn.

Photograph by Alice Levine.

Alopochen aegyptiaca – Egyptian goose, Kirstenbosch Botanical Gardens, Cape Town, South Africa.

Photograph by Thomas Layton.

Photography contest, Honorable Mention.

Sula nebouxii – blue-footed booby, Espanola Island, Galapagos Islands.

As we reflect upon the amazing body of work left behind by this giant of the movie scene, readers of the Thumb should know (if they don’t already) that Roger Ebert was a passionate defender of science, and of evolution in particular.

His passion was not un-noticed by creationists (of both young-earth and intelligent design categories). William Dembski had this to say about Ebert in an Uncommon Descent blog from 2006:

Roger Ebert: Film Critic, Expert on Evolution, ID Basher, and Overall Supergenius .….. Or is Ebert just another clueless bonehead whose imagined expertise is in exact disproportion to his actual knowledge …

Here are some memorable comments by Ebert on creationism, evolution, and religion.

Win Ben Stein’s mind, December 3, 2008

The more you know about evolution, or simple logic, the more you are likely to be appalled by the film. No one with an ability for critical thinking could watch more than three minutes without becoming aware of its tactics. It isn’t even subtle. Take its treatment of Dawkins, who throughout his interviews with Stein is honest, plain-spoken, and courteous. As Stein goes to interview him for the last time, we see a makeup artist carefully patting on rouge and dusting Dawkins’ face. After he is prepared and composed, after the shine has been taken off his nose, here comes plain, down-to-earth, workaday Ben Stein. So we get the vain Dawkins with his effete makeup, talking to the ordinary Joe.

I have done television interviews for more than 40 years. I have been on both ends of the questions. I have news for you. Everyone is made up before going on television. If they are not, they will look like death warmed over. There is not a person reading this right now who should go on camera without some kind of makeup. Even the obligatory “shocked neighbors” standing in their front yards after a murder usually have some powder brushed on by the camera person. Was Ben Stein wearing makeup? Of course he was. Did he whisper to his camera crew to roll while Dawkins was being made up? Of course he did. Otherwise, no camera operator on earth would have taped that. That incident dramatizes his approach throughout the film. If you want to study Gotcha! moments, start here.

How I believe in God, April 17, 2009

During in all the endless discussions on several threads of this blog about evolution, intelligent design, God and the afterworld, now numbering altogether around 3,500 comments, I have never said, although readers have freely informed me I am an atheist, an agnostic, or at the very least a secular humanist–which I am. If I were to say I don’t believe God exists, that wouldn’t mean I believe God doesn’t exist. Nor does it mean I don’t know, which implies that I could know.

Let me rule out at once any God who has personally spoken to anyone or issued instructions to men. That some men believe they have been spoken to by God, I am certain. I do not believe Moses came down from the mountain with any tablets he did not go up with. I believe mankind in general evidently has a need to believe in higher powers and an existence not limited to the physical duration of the body. But these needs are hopes, and believing them doesn’t make them true. … No, I am not a Buddhist. I am not a believer, not an atheist, not an agnostic. I am still awake at night, asking how? I am more content with the question than I would be with an answer.

Darwin survives as the fittest, February 11, 2009

The True Believers. Found in both parties. One side declares God without any doubt does exist, and created the universe and everything in it. A much smaller subset of this group is convinced that God did this in fairly recent times–as little as 6,000 years ago, or in any event too recently for Darwin’s evolutionary process to have had enough time to take place. The other side declares that God without any doubt does not exist, and it is equally certain. Both sides frequently quote the Bible, on the one hand citing its truth, on the other side citing its falsity. Christianity is the only religion involved; my blog has readers from all over the world, but apparently those from elsewhere find Intelligent Design a uniquely American notion.

The longest thread evolves, September 4, 2009

The zealots of Creationism are indefatigable. Even now there are attempts to legislate that the pseudo science of Intelligent Design must be taught in school systems as a “debate” with Evolution. In common sense terms, that debate was over a century ago. Yet there are votes out there for politicians who support such legislation, and at the 2008 GOP presidential debate, no less that three candidates said they do not believe in evolution. I suppose I should be gratified that there weren’t more.

New Agers and Creationists should not be President, December 2, 2009

My only purpose today is to state early and often that if a Presidential candidate believes early humans used saddles to ride on the backs of dinosaurs, as they are depicted at the Creation Museum in Petersburg, Kentucky, that candidate should not be elected President.

And if a candidate counts among close friends and advisors anyone in communication with the spirit world, that candidate should not be elected President.

And if a candidate accounts for the fact that humanoid and dinosaur bones are never found at the same level in the fossil record by evoking the action of sediment after the Great Flood, that candidate should not be President.

And if a candidate has a spirit guide, consults his or her Chart and takes more than a passing amusement in the horoscope, that candidate should not be elected President.

There’s a category page linking these and other blogs, appropriately titled “Darwin My Hero”.

Comments about Roger Ebert are welcome. Comments that are nonsequiters, religious rants, or are otherwise irrelevant, will be tossed onto the Bathroom Wall.

Photograph by Jon Woolf.

Photography contest, Honorable Mention.

The Great Unconformity in the Grand Canyon. Mr. Wolf writes that the unconformity “demonstrates geologic time and a number of basic geologic rules that help to destroy YEC.”

After the unit on Creationism and Intelligent Design in my Critical Thinking/Science and Pseudoscience class at New Mexico Tech (Psych 189), I asked the students to write an essay on the question

Is “Intelligent Design” just another version of Creationism? Why?

Along came student Elaine, who included this comment in her essay:

It seems that if you are only comparing Intelligent Design against Creationism, there are enough subtleties to identify one or the other. However, if it is a case of arguing Intelligent Design vs. Creationism vs. evolution, the contrast between evolution and the other two is so great that Intelligent Design and Creationism become indistinguishable in their respective arguments. The only giveaway would be a reference to Genesis, the use of “God” rather than “Creator/Designer”, or some explicit differentiation between the two. In contrast, no one could ever possibly confuse an evolution argument with any other.

I remarked that the student had used evolution as an outgroup to correctly root the evolution/creationism/ID tree, and gave her an “A” for the assignment.

Discuss.

Photograph by Danny Satterfield.

Photography contest, Honorable Mention.

Banded gneiss on east coast of Greenland, south of Qaanaaq.

Photograph by Greg Mead.

Photography contest, Honorable Mention.

Mesa located between Zion Canyon and Bryce Canyon National Parks, Utah, ca. 1985.

Mr. Mead writes, “It beautifully exhibits tilted and horizontal sedimentary layers, faults, and an erosional surface (an “unconformity”), all of which you can use to determine the relative age of the features. Even in this picture, the sediments include at least 20 easily identifiable beds, some separated by erosion, and they have been tilted below the unconformity.

“It is pretty much impossible for those to be formed by a single catastrophic event, and it is the kind of thing that caused naturalists, starting in the 17^th century, to begin to understand the great age of the Earth.”

Neil Shubin has been out and about speaking on behalf of his recent book, The Universe Within, in a variety of venues. He summarizes his theme in this video. And as dessert, there’s this short one on Tiktaalik from the Royal Institution channel.

Photograph by James Wood.

Photography contest, Honorable Mention.

Tasmanipatus barretti – giant velvet worm found in a rotting log in northeast Tasmania. This species is restricted to a range of 600 km² in the northeast corner of the state and is listed as rare under Tasmanian state legislation.

We have been going through our archives to find excellent contest entries that have not so far been posted. We begin with this picture, which dates from the first photography contest in 2009. Our apologies to the photographers, but we had an embarrassment of riches the first few years.

Photograph by Kurt Andreas.

Photography contest, Honorable Mention.

Pachydiplax longipennis – blue dasher (male), New Paltz, New York, August 13, 2010.