Charles Darwin
gregladen | January 6, 2009It turns out that a recently discovered population of land iguanas on the Galapagos is probably a new species that represents the basal (original) form of Galapagos land iguana. Moreover, this iguana is found in an unexpected place, according to a paper just coming out in the Proceedings of the National Academy of Sciences (PNAS).
And it's pink.
In 1984, Hickmann and Lipps said the following about the various pieces of evidence giving age estimates for the Galapagos islands:
... all are less than about 2 million years old. This age, together with independently determined geologic ages,…
gregladen | January 5, 2009This is my favorite web carnival, and this is the best version of it yet, owing to the outstanding submission we have this month!
Welcome to the 15th Monthly edition of the blog carnival Linnaeus' Legacy. I thought about being cute and fancy for this edition of the carnival, but instead, I decided to be very systematic.
(de - dum - dum)
So we will work our way from foundations to theory to taxonomy, and within the taxonomic sphere we will sort out all the organisms by type and deal with them as such appropriately. And then, we will have one little item related to extinction. The place…
gregladen | January 4, 2009The following announcement is from Nature.
About a year ago, an Editorial in these pages urged scientists and their institutions to 'spread the word' and highlight reasons why scientists can treat evolution by natural selection as, in effect, an established fact (see Nature 451, 108; 2008).
This week we are following our own prescription. Readers will find at http://www.nature.com/evolutiongems a freely accessible resource for biologists and others who wish to explain to students, friends or loved ones just what is the evidence for evolution by natural selection. Entitled '15 evolutionary…
gregladen | December 31, 2008Naturalism is a potential source of guidance for our behavior, morals, ethics, and other more mundane decisions such as how to build an airplane and what to eat for breakfast.1 When it comes to airplanes, you'd better be a servant to the rules of nature or the airplane will go splat. When it comes to breakfast, it has been shown that knowing about our evolutionary history can be a more efficacious guide to good nutrition than the research employed by the FDA, but you can live without this approach. Naturalism works when it comes to behavior too, but there are consequences. You probably…
gregladen | December 25, 2008Did you get a gift card for a bookstore from Santa? Consider this new item (Thanks Virgil Samms for the tip!): Mrs. Charles Darwin's Recipe Book: Revived and Illustrated
A cookbook based on notes by Charles Darwin's wife is to be published.
Mrs Charles Darwin's Recipe Book features more than 40 dishes from her personal cookery notebook, which is housed in Cambridge University Library.
Turnip cresselly, broiled mushrooms, cheese straws and baked apple pudding all feature in the Victorian notes. ... (bbc)
gregladen | December 24, 2008From whence the humble chicken? Gallus gallus is a domesticated chicken-like bird (thus, the name "chicken") that originates in southeast Asia. Ever since Darwin we've known that the chicken originated in southeast Asia, although the exact details of which one or more of several possible jungle fowls is the primal form has been debated. The idea that more than one wild species contributed to the early chicken has been on the table for a long time, though perhaps not as long as the chickens themselves have been on the table.
Not only is this Year in Review story about the origin of the Chicken…
gregladen | December 19, 2008The details are not yet worked out, but the Bell Museum in Minneapolis, thanks to the inspiration and efforts of DNA artist and Twin Cities' answer to Ira Flatow, Lynn Fellman, and Bell Museum events organizer, Twin Cities Celebrity and spectacular Cafe Scientifique Host Shanai Matteson, will have a special Darwin Day Celebration and YOU are invited!
When official verbiage becomes available, I'll post it. For now, here is what I can tell you:
The date is February 12th. That is Darwin's 200th birthday. The location will be the Bell Museum in Minneapolis, East Bank Campus of the University…
gregladen | December 18, 2008
Actually, it's Lefortovo Tunnel, Russia.
Don't go to Russia. And if you do, stay out of the tunnel.
gregladen | December 5, 2008Allen's Rule. One of those things you learn in graduate school along with Bergmann's Rule and Cope's Rule. It is all about body size. Cope's Rule ... which is a rule of thumb and not an absolute ... says that over time the species in a given lineage tend to be larger and larger. Bergmann's Rule says that mammals get larger in colder environments. Allen's Rule has mammals getting rounder in colder climates, by decreasing length of appendages such as limbs, tails and ears.
All three rules seem to be exemplified in human evolution. Modern humans tend to be larger and rounder in cooler…
gregladen | December 3, 2008I absolutely love this:
I've been accused of refusing to review Ben Stein's documentary "Expelled," a defense of Creationism, because of my belief in the theory of evolution. Here is my response.
Ben Stein, you hosted a TV show on which you gave away money. Imagine that I have created a special edition of "Who Wants to be a Millionaire" just for you. Ben, you've answered all the earlier questions correctly, and now you're up for the $1 million prize. It involves an explanation for the evolution of life on this planet. You have already exercised your option to throw away two of the wrong…
gregladen | November 28, 2008A new study published by Chiao et al. in the journal PLoS ONE explores the gendered nature of American voting behavior. Subjects were asked to rank politicians -- based only on photographs of each politician's face -- along different quality scales, and also to choose among these photographs who should be President. The study concludes that male and female candidates are evaluated on distinctly different terms, and that male and female voters do this evaluation in somewhat (but not dramatically) different ways. The authors conclude that "...contrary to popular notions, people are not…
cevans | November 16, 2008
Science, as a discipline, is driven by the desire to understand everything. The immensity of such a project necessitates that science be undertaken not by one group of men and women in one time, but all men and women for all time. However, the final goal always eludes us: to understand this, we must first understand this, but to understand that, we must understand this, ad infinitum. In fact, the very notion of there being a final point in science has become so abstract as to be almost irrelevant; the more we know, the more we know that we do not know, and the end of the game is nowhere to…
gregladen | November 14, 2008The paper I'm about to discuss is a minefield of potential misconceptions that arise from the way we often use language do describe natural phenomena. This is a situation where it would be easier to start with a disclaimer ... a big giant obvious quotation mark ... and then use the usual misleading, often anthropomorphic language. But I don't think I should do that. We'll address this research the hard way, but the result will be worth the extra work.
Here is the basic hypothesis. The null model is that genetic variation arises randomly and this variation is the raw material on which…
gregladen | October 15, 2008The creationist-biased Texas Board of Education has assembled a committee to 'review science curriculum standards.' This group includes a few actual scientist types, and ... pay attention folks .. Wisconsin based ID creationist Ralph Seelke, Baylor creationist chemist Charles Garner, and Stephen Meyer, vice president of the Discovery Institute. Yes, you read that right. The Texas Board of Education has appointed the President of the Discovery Institute to a committee to review the state's science standards.
un be-fucking-lievable.
There is clearly something you can do to stop this now.…
gregladen | October 13, 2008 A very good day of grunting worms. Credit: Ken Catania So-called Gene-Culture Co-Evolution can be very obvious and direct or it can be very subtle and complex. In almost all cases, the details defy the usual presumptions people make about the utility of culture, the nature of human-managed knowledge, race, and technology. I would like to examine two cases of gene-culture interaction: One of the earliest post-Darwinian Synthesis examples addressing malaria and sickle-cell disease, and the most recently published example, the worm-grunters of Florida, which it turns out is best…
gregladen | September 5, 2008
A steady stream of devoted evolutionists continued to gather in this small Tennessee town today to witness what many believe is an image of Charles Darwin--author of The Origin Of Species and founder of the modern evolutionary movement--made manifest on a concrete wall in downtown Dayton.
"I brought my baby to touch the wall, so that the power of Darwin can purify her genetic makeup of undesirable inherited traits," said Darlene Freiberg, one among a growing crowd assembled here to see the mysterious stain...
source
Apparently, the image is the product of differential growth patterns of…
gregladen | August 25, 2008David Campbell is a life science teacher in Florida who was recently profiled in the New York Times because of his involvement in the debate between Creationism and Evolution. This discussion is being picked up in the Blogosphere, and this is very timely, as this is the time when teachers in most US school districts are just heading back to class.
My "back to school" contribution is a repost of one of my more popular bits on the problem of the bible thumping student. This is revised and reposted from my old site. Enjoy:
.... Have you ever had this happen: You are minding your own…
gregladen | August 25, 2008I am currently reading Charles Darwin (Blackwell Great Minds), and so far I mainly like it.
Ruse, as you may know, is a philosopher, something of a science historian, and a science writer who has criticized what he calls "strident" atheism for being too fundamentalist. So that is as annoying as hell. The volume at hand has a large chapter on this issue, and if you read it not knowing about this earlier debate, I think you would come away not being too annoyed, and might even enjoy it, if you consider yourself a .. ahem ... 'strident' atheist. It is annoying, however, that Ruse places "…
gregladen | August 8, 2008Check out this podcast from the Institute for Humanist Studies.
In this month's audio podcast we are dedicating the entire program to one story. During the 1970s, P. Thomas Carroll read and transcribed hundreds of Charles Darwin's personal correspondences for research purposes. Carroll shares his story of becoming intimately familiar with the great 19th century evolutionary biologist over the course of several years and 14,000 letters.