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June 17, 2013

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2:00 PM | Inheritance of Traits In this video Paul Andersen explains the...
Inheritance of Traits In this video Paul Andersen explains the importance of DNA is organisms. DNA contains the blueprint for each organisms. The DNA codes for the mRNA which creates proteins. The DNA also is the unit of inheritance which is passed from generation to generation. A K-12 teaching progression is also included. via Bozeman Biology.
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12:19 PM | Height through the millennia
For the last year or so, I have had sitting in my “to blog” pile a 2004 New Yorker article about the increasing height of Europeans relative to Americans. It has a lot of interesting content. It talks about how height peaked in Europe around 800 AD, before declining through to 1700 (largely associated with [...]The post Height through the millennia appeared first on Evolving Economics.
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7:23 AM | Reproductive quirks (part 2): Why did menstruation evolve?
As I’ve noted previously, humans are strange beasts and our reproductive biology illustrates this well. Menstruation and menopause are both rare in the animal kingdom. Of all mammals, only us, our primate relatives and elephant shrews menstruate. Menopause is even harder to come by — killer whales are our only sisters in hot-flushes, apparently. This […]

June 16, 2013

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11:18 PM | A Few Tidbits about Epigenetics: The Methylome
The Methylome is a new toy of genetic science. It adds yet another level of complexity “above genetics”, responsible for affecting patterns of gene expression and, relevant to my line […]
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8:41 PM | I’m Back on Dom’s Sketch Cast
Dom and I discuss how frogs find romance, dolphin necropsies, aliens, and Batman. Have a listen, and check out the awesome he drawing he made to go with it!    
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2:56 PM | TWiV 237: Paleovirology with Michael Emerman
Episode #237 of the science show This Week in Virology was recorded at the Fred Hutchinson Cancer Research Center in Seattle, WA, where Vincent and Rich met up with Michael to talk about his work on the molecular and evolutionary basis of HIV replication and pathogenesis. You can find TWiV #237 at www.twiv.tv.
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2:00 PM | Variation of Traits In this video Paul Andersen explains how...
Variation of Traits In this video Paul Andersen explains how variation is created in a population over time. Variation in offspring is caused by genetic recombination, mutations and environmental effects. Parental DNA is recombined using the process of meiosis. Mutations can add novel genes to a population and the environment can shape the expression of genes. A K-12 teaching progression is also included. via Bozeman Biology.
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11:33 AM | New petition to ban teaching against evolution
A new petition has appeared at the White House petition site to ban religious-based “science” instruction. Ban Creationism and Intelligent Design in the science classroom as federal law. | We the People: Your Voice in Our Government. Since Darwin’s groundbreaking…Continue →
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6:25 AM | Man Milk & Dad Lactation
One day, according to my Dad, when I was a wee bitty baby, I latched onto his […]

June 15, 2013

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1:00 PM | Diseased Tigers, Wounded Rhinos and Other Links from the Brink
Diseases, poachers, smartphones, sewage and animal psychology are in the news this weekend. Temper Tantrum: Evidence of canine distemper has been found in Sumatran tigers (Panthera tigris sumatrae) in Indonesia, according to a recent report from BBC News. Distemper has previously been found in Amur tigers (Panthera tigris altaica) in Russia, where it proved to [...]
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10:02 AM | A brief history of sengis, or elephant shrews
Macroscelideans – the elephant shrews or sengis – are an exclusively African group of animalivorous placental mammals, famous for their long, mobile snouts [adjacent image of a rhynchocyonine sengi by Joey Makalintal]. They have long tails, proportionally elongate limbs, and range in size from 10 to 30 cm, and from 50g to over 500g. Digital [...]
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1:29 AM | #SciAmBlogs Friday – Superman, flags and taxes, behavioral economics, lost cousins of Homo sapiens, and more.
- E. Paul Zehr – The Man of Steel, Myostatin, and Super-Strength   - Jag Bhalla – Better Behaved Behavioral Models   - Kyle Hill – 10 Sciencey Stats on the Man of Steel   - Paige Minteer – The lost cousins of Homo sapiens in Asia and the South Pacific   - Judy Stone [...]

June 14, 2013

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10:36 PM | Morsels for the mind – 14/6/2013
Every day we provide you with #SixIncredibleThingsBeforeBreakfast to nibble away at. Here you can fill your brain with the most intellectually stimulating “amuse bouches” from the past week – a veritable smorgasbord for the cranium. They’re all here for you to load up your plate – this week’s “Morsels for the mind”.  Enjoy! **** Feather, fur & fin – birds, beasts, fishes, and the things they do Captivating cat-a-log. Ever wonder what cats do with themselves as they hang […]
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8:10 PM | The lost cousins of Homo sapiens in Asia and the South Pacific
By Paige Minteer The evolution of humans is the result of a number of speciation events that have built upon one another to create the modern-day human species: Homo sapiens. Humans are believed to have evolved from a line of ancestors dating millions of years ago and originating in Africa.  The subsequent Homo sapien ancestors [...]
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7:55 PM | Putting the [men] in [menopause] New study challenges grandmother theory
It’s no secret that men find youthful-looking women attractive. We see it in countless movie plots. A well-to-do married man gets bored of his wife, and his young 20-something secretary who is always wearing some sort of low-cut blouse catches his eye. It’s human nature right? He can’t fight the temptation. And then sometimes the […]
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5:15 PM | Leprosy’s disappearing act came from public health improvements
Old bones show its decline came despite few changes in the leprosy bacteria.
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3:55 PM | Culture Memes Information WTF!
I’ve been thinking a lot about information recently, mostly as a consequence of reading Dan Dennett on memetics. I’m uncomfortable with his usage, and similar ones, and I can’t quite figure out why. Let me offer two passages, and then some comments. The first passage is from George Williams, a biologist. It’s in a chapter read more...
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1:34 PM | Bora’s Picks (June 14th, 2013)
A Sunken Egyptian City is Rediscovered, Stunning Researchers and Enthusiasts Alike by Khalil A. Cassimally: Named Thonis by the Egyptians who built it but known as Heracleion to the Greeks of the time, this great city was once a central part of ancient Egypt. Older than Alexandria, Thonis was probably founded during the eighth century [...]
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12:33 PM | A week of links
Links this week: There have been some strong reactions to the Edge piece on Napoleon Chagnon (I pointed it out last week, and if you haven’t yet, give it a look). Some are entertaining, although most are not particularly enlightening. Jason Anstrosio goes the epigenetics maneuver and Stephen Corry pins death rates among ancient hunters [...]The post A week of links appeared first on Evolving Economics.
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1:15 AM | Biological Costs
In several posts the question of biological costs is invariably mentioned in discussing evolution.  These costs are normally of the metabolic or fitness type.  Metabolic costs are associated with the existence of a particular trait and the energy necessary for the trait's existence, while fitness costs are those that have an impact on the organism's ability to survive and reproduce (1).In most instances, these concepts are taken from economic analogies, yet, like economics, the […]
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1:13 AM | #SciAmBlogs Thursday – leprosy, cicadas, oreogeny, DNA patents, Chladni figures, and more.
Watch the latest Video of the Week! - Naveena Sadasivam – Cornell student scrapes Indian exam results, exposes the system’s flaws   - Scicurious – A genetic history of leprosy   - John R. Platt – Climate Change versus Groundhogs: Even Common Species Will Suffer   - Kyle Hill – Reweaving the Rainbow: Cicadas, Science, [...]
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12:47 AM | How Diving Mammals Evolved Underwater Endurance
Scientists at the University of Liverpool have shed new light on how diving mammals, such as the sperm whale, have evolved to survive for long periods underwater without breathing. The team identified a distinctive molecular signature of the oxygen-binding protein myoglobin in the sperm whale and other diving mammals, which allowed them to trace the …

June 13, 2013

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10:42 PM | 5 Human/Chimpanzee Differences
Want to know exactly what makes you special? Ok, read on. Charles Darwin was primarily interested in divergence. He wanted to know what evolutionary pressures made organisms different. In The Descent of Man he spent a considerable amount of time contemplating what it was that made...5 Human/Chimpanzee Differences was first posted on June 13, 2013 at 10:42 pm.©2013 "The Advanced Apes". Use of this feed is for personal non-commercial use only. If you are not reading this article in your feed […]
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7:26 PM | A Persistent Case of Diabetes Mellitus in Guam
By Amanda Ungco Proud of their culture and successes, Americans have soaked up the American dream and have broadened their wings to influence the rest of the world. Many of these influences manifest themselves as good deeds, bringing students, volunteers and various charity organizations to third world countries in an attempt to better the universal [...]
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7:26 PM | Why did leprosy leave Europe?
Well, it didn't LEAVE, but it did become far less common after 1500. Why? Was it leprosy? Or was it us? Or was is something else? I'm at SciAm blogs today talking about a brand new study on the genetics of leprosy bacteria. Head over and check it out!
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6:05 PM | A genetic history of leprosy
Leprosy is one of those diseases that, when I first read about it, haunted my imagination. I had sad pictures of haggard, dirty people, wearing sackcloth, covered in sores or maybe with toes, noses, or hands missing, shuffling alone, wearing a bell to make that no one would go near…the leper. To be a leper [...]
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3:46 PM | Benjamin Franklin And Erasmus Darwin: Musings About Geology and Evolution
I am reading When You Were A Tadpole and I Was A Fish  by Martin Gardner. It is a collection of essays on science and culture. There is a really good one on the complex personality of Isaac Newton, another one on Ann Coulter's rants against evolution and quite a bit of writing on debunking paranormal claims. I haven't yet finished the entire book with some chapters on literature and religion still unread. I am not sure they will hold my interest as there is more critical dissection […]
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2:00 PM | Speciation beyond sexuality: critiques to the biological species concept
The word “species” is one of the most relevant and controversial in the history of Biology and has often become the main topic of many […] Read moreThe post Speciation beyond sexuality: critiques to the biological species concept appeared first on Mapping Ignorance.
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1:03 PM | Climate Change versus Groundhogs: Even Common Species Will Suffer
A warming world will present Punxsutawney Phil and his cousins with a host of new challenges, possibly enough to put some species at risk of extinction. According to research published last month in the journal Natural Science, climate change will bring temporary benefits to several of the world’s 15 marmot species (including the groundhog), but [...]
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12:44 PM | My dogs' evolutionary history. Part 2: Results
Yesterday we made the predictions of the breed signatures we'd find in our dogs' DNA.If you didn't already, please consider going back to yesterday's post first before reading today's. Predictions are key! It's best if you confirm our guesses and/or add your own. (...what are the reasons for your predictions? Size? Color? Ears? Tails? Fur? Snout? Furnishings?)Sadly (yes, sadly), predictions are not part of the official Wisdom Panel or 23andMe experiences. When I teach with […]
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