biology
ksharpe | March 17, 2009Originally posted by Grrlscientist
On March 14, 2009, at 10:59 AM
An ocean without its unnamed monsters would be like a completely dreamless sleep.—John Steinbeck, The Log from the Sea of Cortez (Penguin Classics; 1995).
Unlike any of the kids I grew up with, I was absolutely fascinated by sharks. Despite their bloodthirsty reputation, I saw them as elegant and beautiful creatures, although I never appreciated them as individual personalities. But when you read journalist Susan Casey's book, The Devil's Teeth: A True Story of Obsession and Survival Among America's Great White Sharks (Henry…
oracknows | March 17, 2009Yet another reason why I love The Onion:
Because giant, highly intelligent, acid-spitting crabs pose no danger to society.
Of course, certain antivaccine advocates seem to think that this parody has something to do with vaccines, which just goes to show how far down the rabbit hole they've gone when they think that a parody like this speaks to the truth of their cause. It also reveals a bit of their mentality in that they so easily liken life-saving vaccines to giant, acid-spitting, highly intelligent crabs.
amillikan | March 17, 2009
There are several misconceptions circulating about Charles Darwin and his revolutionary ideas and theories in the field of evolution. That's why, in honor of Darwin's birthday last month, ScienceBlogger John Wilkins from Evolving Thoughts took it upon himself to clear things up. In his eight-part series, "Myths about Darwin," Wilkins addresses and debunks claims such as those that paint Darwin as a social Darwinist or Lamarckian and sets the record straight.
Related ScienceBlogs Posts:
Myth 1: Darwin Did Not Believe in the Reality of Species
Evolving ThoughtsFebruary 10, 2009
Myth 2: Darwin…
tqa | March 16, 2009
I've been going back through some pictures I took last month, trying to identify the birds in the pictures. I've found one gull that I'm having problems with. I've got a couple of shots I'm going to share with you, and then I'll give my current thoughts and reasoning.
The picture was taken on 23 Feb 09, on the grounds of Naval Air Station Pensacola. The gull on the right is the one I'm having difficulty with. The next picture is a closer view of that gull.
I'm reasonably certain that the gull on the left is a Ring-Billed Gull, and the gull on the left definitely seemed to be just a…
jstemwedel | March 15, 2009One of the jellies we saw during our February visit to the Monterey Bay Aquarium is especially important to biologists. The crystal jelly (Aequorea victoria) is not only an interesting critter in its own right, but also serves as a source of green fluorescent protein (GFP), used to mark genes.
Like the cross jellies, the crystal jellies are fairly transparent and tend towards the small, with bells around 3 inches in diameter (although occasionally they get as big as 10 inches). Proportionately, their tentacles are a little bit longer.
Their preferred food, copepods, comb jellies, and…
jstemwedel | March 14, 2009We've been watching some episodes of Blue Planet here, marveling at the beautiful cinematography, as well as at how emotionally gripping they can be.
Especially in the Frozen Seas episode, I found myself feeling almost wrung out by the dramatic roller-coaster. This is definitely nature red in tooth and claw (and blood-soaked maw), although as my better half points out, there's actually rather less on-camera carnage than you might expect from the narration.*
I think part of the dramatic tension comes from the fact that most of the animals featured in this episode are fairly charismatic mid-…
bioephemera | March 13, 2009
I don't know how in hell I missed this one, but thank heavens A Repository for Bottled Monsters alerted me to the "Uterine Plush Recall" over at I Heart Guts! Apparently the uterus "failed a pull test" and "the ovaries may be pulled off and become a choking hazard"! I do not think I am alone in saying eeeuuuuww!
I Heart Guts assures us that rest of their smiling fuzzy internal organs are perfectly safe for all ages, but if you are in possession of a smug, Thriller video-dancing, pink plush uterus with hazardous trachea-sized violet ovaries, please contact appropriate support personnel…
bioephemera | March 12, 2009You've probably heard about the man with the eyeball camera. Here's the most detailed (and sometimes graphic) video I've yet seen about documentary filmmaker Rob Spence (aka Eyeborg), who is working on getting his prosthetic eye replaced with a wireless eye socket camera:
I first encountered Spence in this writeup at Wired last fall. According to the new video, they've hit a few snags since then, but for some reason Spence is all over the news right now. And it's a safe bet he'll continue to be, if he becomes the first cyborg reporter with a bionic eyecamera!
More: a briefer AP video on…
ksharpe | March 12, 2009Originally posted by Brian Switek
On March 10, 2009, at 11:14 AM
In 1857 Richard Owen proposed that our species, Homo sapiens, belonged to a distinct subclass separate from all other primates. He called this new group the Archencephala and based it as much upon human powers of reason as minute neuroanatomical differences between apes and humans. What's more, our "extraordinarily developed brain[s]" not only placed us above all other creatures but gave us new moral responsibilities, and in closing Owen stated;
Thus [Man] fulfils his destiny as the master of this earth, and of the lower…
bioephemera | March 11, 2009
Thought Patterns #1
blood on watercolor paper
Laura Splan, 2003
The International Museum of Surgical Science in Chicago is calling for proposals for "Anatomy in the Gallery:"
[This program] showcases medically themed contemporary art within the unique context of the Museum's historical collections and exhibits. The program was begun in 1998 to help fulfill the Museum's mission of enriching its visitors' lives by enhancing their knowledge and understanding of surgery and related sciences.
Previous exhibitors include Laura Splan (above), Laura Kurtenbach, Geraldine Ondrizek, and Dominic Paul…
amillikan | March 10, 2009Among the non-coding DNA that composes a large percentage of the genomes of humans and other eukaryotic organisms, pseudogenes are genes that were once active but were rendered defunct by mutations at some point in evolutionary history. But some pseudogenes may regain their functionality. A study published in PLoS Genetics last week revealed that a gene that codes for a member of the immunity-related GTPase protein family, IRGM, was subject to a frameshift mutation in an ancestor of primates 40 million years ago, due to insertion of a small fragment of DNA. The non-functional pseudogene…
jstemwedel | March 7, 2009Back in February when we visited the Monterey Bay Aquarium, my communing-with-jellies time included an interval gazing at the cross jelly (Mitrocoma cellularia).
The common name doesn't refer to this jelly's mood (although how you'd assess a jelly's mood is a question you might ponder while watching these critters float by). Rather, it comes from the set of four white canals that you can see under the bell of the jelly. You can see the canals so well because this jelly is fairly transparent. One assumes this is to make it less visible to predators. I'm guessing, however, that animals…
palmd | March 6, 2009If someone were to write a biography of the Creationist neurosurgeon, "Unhinged" would be an apt title. He used to content himself with rants against philosophical materialism, and evangelize for dualism with a zealous religiosity. But that wasn't enough. The "forces of secularism" seemed to keep growing, despite his desire to see some heavenly smiting. In his latest rants, the gloves are off---it's scalpels at twenty paces.
Let's see what's got Egnor so exercised.
First came the announcement by Society for Integrative and Comparative Biology (SICB) that they would boycott Louisiana…
bioephemera | March 3, 2009
A drawer of antique glass eye fragments
Photograph: Peter Macdiarmid/Getty Images
via The Guardian
A new slideshow from The Guardian highlights some of the wonderful medical artifacts found at the new "Brought to Life" website.
moleculeoftheday | March 2, 2009Awhile back, I discussed dicyclohexylcarbodiimide: a condensing agent that helps turn biological monomers (like amino acids) into polymers (like proteins). People use it a lot on peptide synthesizers for this purpose, where the peptides are made in organic solvents. A related compound, EDAC, works in water:
EDAC works just like dicyclohexylcarbodiimide, but in water. People have used it to, for example, condense short pieces of DNA into longer ones.
I've heard it's a sensitizer (allergen) like DCC, but I'm not sure if it's quite as bad (no vapor pressure, anyway).
bioephemera | March 2, 2009
Wax anatomical figure of reclining woman, Florence, Italy, 1771-1800
Science Museum London
Starting today, the Wellcome Trust and sciencemuseum.org.uk open a brand spanking new collection of medical history archives. "Brought to Life: Exploring the History of Medicine" is searchable by people, place, thing, theme, and time. You can view a timeline of medical history in Europe next to similar timelines for the Islamic empire, Egypt and Greece (I do wish China and India were as prominently placed). You can read essays about larger questions, like what "wellness" means, or play with a cool…
oracknows | March 2, 2009Over the weekend, some readers sent me a link to a story that, presumably, they thought would be of interest to me, given that I graduated from the University Michigan Medical School back in the late 1980s. Specifically, it's a report that U. of M. has halted the use of dogs in its surgical training:
Surgeons training at the University of Michigan Health System will no longer use live, healthy dogs to learn drastic surgical procedures that can save people's lives, the university announced Thursday.
The anesthetized animals -- obtained from shelters -- were used to teach tracheotomies, how to…
bioephemera | March 2, 2009
Juliet Lapidos at Slate tells you. Now that you know, please don't send it to me.
Image: International Air Transport Association guidance document on infectious substances (pdf)
revere | March 2, 2009There is as yet no pandemic bird flu vaccine but there are a lot of potential vaccines. The recent fiasco involving Baxter International (here, here) involved one in development. There are many more. They employ old and new technologies and are in various stages, a few in early clinical trials. Many more are in the pre-clinical (animal or test tube) phase, although they are frequently reported in the news because the company developing it wants to attract support or publicity. I often don't pay attention to announcements of "breakthroughs" that are successful in mice. Many vaccines work in…
jstemwedel | March 1, 2009During our second day at the Monterey Bay Aquarium last weekend, I finally got my much needed jelly time. I also had occasion to notice that their jelly exhibits have shrunk significantly since their height a few years ago, and that some of my favorite varieties are no longer on display. Booo! MOAR JELLEES PLEEZ!
Ahem. Where was I?
Anyway, there are still some pleasing jellies on display. One of these is the purple-striped jelly (Chrysaora colorata).
The common name for these jellies comes from the deep colored bands on its bell. To me, the coloration doesn't look purple, exactly.…