is an attempt to build a complete cellular-level simulation of the nematode worm Caenorhabditis elegans. Of the 959 cells in the hermaphrodite, 302 are neurons and 95 are muscle cells. The simulation will model electrical activity in all the muscles and neurons. An integrated soft-body physics simulation will also model body movement and physical forces within the worm and from its environment." -- Bonus: explore the worm's cellular anatomy in 3D
posted by MartinWisse
on Jun 3, 2013 -
Is Psychometric g a Myth?
- "As an online discussion about IQ or general intelligence grows longer, the probability of someone linking to statistician Cosma Shalizi's essay g, a Statistical Myth
approaches 1. Usually the link is accompanied by an assertion to the effect that Shalizi offers a definitive refutation of the concept of general mental ability, or psychometric g
." [more inside]
posted by kliuless
on Apr 11, 2013 -
In temperate climates, "fairy rings
" appear in grassy meadows and lawns, and these are caused by fungi, with some rings expanding for hundreds of years
. But in the western part of Southern Africa, there are a different sort of "fairy circles
," barren circles that are surrounded by long-lived perennial grasses. The Himba people
, an ethnic group in northern Namibia, attribute them to original ancestor, Mukuru, or consider them "footprints of the gods,"
and scientists have been stumped for decades
. Professor Norbert Jürgens
, from the University of Hamburg, might have finally solved the riddle
: a species of termites that are most active at night and don't build big, noticeable nests, have engineered the ecosystem by eating the roots of grasses that grow within the circle, keeping the soil moist for long periods of time
. The discussion continues, as some scientists who have studied the phenomena aren't so sure about the theory
posted by filthy light thief
on Mar 29, 2013 -
Is it time to put natural selection in its place?
Jello Biafra once famously wrote that "If evolution is outlawed, only outlaws will evolve.
" But while it likely comes as no surprise to specialists working in the field or to those who've been following developments in evolutionary biology closely, there's an emerging view among experts that Darwin's view of natural selection as the primary driver of speciation and evolutionary change may be incorrect or at least drastically overstated. It's long been understood that non-adaptive evolutionary mechanisms like "genetic drift
" and random mutation also play non-trivial roles in evolutionary processes, but a recent study
(link to abstract with full-text PDF available) casts new doubts on the primary role of natural selection, finding that "Neutral models, in which genetic change arises through random variation without fitness differences have proven remarkably successful in describing observed patterns of biodiversity." [more inside]
posted by saulgoodman
on Mar 28, 2013 -
The Hidden Life Of the Cell (57:24)
There is a battle playing out inside your body right now. It started billions of years ago and it is still being fought in every one of us every minute of every day. It is the story of a viral infection - the battle for the cell. This film reveals the exquisite machinery of the human cell system from within the inner world of the cell itself - from the frenetic membrane surface that acts as a security system for everything passing in and out of the cell, the dynamic highways that transport cargo across the cell and the remarkable turbines that power the whole cellular world to the amazing nucleus housing DNA and the construction of thousands of different proteins all with unique tasks. The virus intends to commandeer this system to one selfish end: to make more viruses. And they will stop at nothing to achieve their goal. Exploring the very latest ideas about the evolution of life on earth and the bio-chemical processes at the heart of every one of us, and revealing a world smaller than it is possible to comprehend, in a story large enough to fill the biggest imaginations.
You may be familiar with molecular movies from my two previous megaposts collecting them, but this extended documentary uses original animation that is collected into a coherent educational narrative and is just so fucking gorgeous. Enjoy. [more inside]
posted by Blasdelb
on Mar 24, 2013 -
Science Fiction Comes Alive as Researchers Grow Organs in Lab
1997 -- Charles Vacanti of University of Massachusetts Medical Center and Robert Langer of Massachusetts Institute of Technology report the growing of a cartilage structure – in the shape of a human ear – on a mouse’s back. 2008 -- Doris Taylor at the University of Minnesota and colleagues grow a beating rat heart in the lab. 2008 --Surgeons in Spain transplant a new windpipe into a patient. The organ is made from a cadaver windpipe stripped of its original cells and reseeded with the patient’s own cells. 2010 -- Researchers at Mass General Hospital grow a rat liver. 2010 -- Yale University scientists grow a functioning rat lung. 2010 -- Alex Seifalian in London transplants a lab-made tear duct into patient 2011 -- Dr. Seifalian makes a windpipe from nanocomposite materials plus a patient’s own stem cells; the new windpipe replaces the patient’s cancerous one, saving his life. In a separate procedure, an artery made at Dr. Seifalian’s lab is transplanted into a patient. 2012 -- Surgeons in Sweden transplant a major blood vessel into a 10-year-old girl. The vein was taken from a dead man, stripped of its tissue, then reseeded with the girl’s own cells. 2013 -- Scientists from Cornell University report the making of a human ear using living cartilage cells.
posted by jason's_planet
on Mar 23, 2013 -
What do 3D printing, jelly, liver transplants, chainmail, dental fillings, ferrofluids, and the Six Million Dollar man have to tell us about our future? Materials scientist and engineer Mark Miodownik lets us know in this Royal Institution lecture
posted by cthuljew
on Mar 22, 2013 -
Why are owls so wise? Perhaps it's because they're utter badasses.
Ferocity is essential for a bird whose frigid, spotty range extends across northeastern China, the Russian Far East and up toward the Arctic Circle, one that breeds and nests in the dead of winter, perched atop a giant cottonwood or elm tree, out in the open, in temperatures 30 degrees below zero Fahrenheit. Dr. Slaght’s colleague Sergei Surmach videotaped a female sitting on her nest during a blizzard. “All you could see at the end was her tail jutting out,” Dr. Slaght said.
The New York Times Science section
gives an update on some current owl research. [more inside]
posted by medusa
on Feb 28, 2013 -
Hello and welcome to Links to the Damn Paper, an open discussion community showcasing the best in freely-available biology research. If you’ve ever tried to have a discussion about science on the Web and been stymied and frustrated by inaccessible articles, misrepresentation of research in science journalism, or a community that seems uninterested in digging into the actual research behind a topic, then welcome: you are our people. If you’ve ever wished for a place to talk about the Science of Life where you could be sure that the actual articles were available, where compelling research was presented in a way that allowed it to speak for itself, and where you could discuss science with actual scientists and with other people who are passionate about science for its own sake, then you have found your haven.
MeFi's own Blasdelb
, and Scientist
have G(T)OB. And it is good.
[via mefi projects
posted by you must supply a verb
on Feb 19, 2013 -
Quantum Biology -
Disappearing in one place and reappearing in another. Being in two places at once. Communicating information seemingly faster than the speed of light.
This kind of weird behaviour is commonplace in dark, still laboratories studying the branch of physics called quantum mechanics, but what might it have to do with fresh flowers, migrating birds, and the smell of rotten eggs?
More: Quantum smell' idea gains ground
posted by marienbad
on Jan 28, 2013 -
Jennie Linn McCormack "isn’t the only woman in recent years to be prosecuted for ending her own pregnancy. But her case could change the trajectory of abortion law in the United States": The Rise of DIY Abortions
. [more inside]
posted by zarq
on Jan 3, 2013 -
Researchers at the National Veterinary School of Alfort in Paris recently carried out a study of the friendliness of different cat breeds, surveying the owners of 129 cats about the cats' interactions with people. The survey determined that
pedigree cats are significantly friendlier than crossbreeds
, a difference which the researchers put down to pedigree kittens being left with their mothers for longer at a crucial developmental period and/or breeders selecting for friendliness as a genetic trait. The friendliest breed of cat is reportedly the sphynx
, an exotic hairless breed, possibly due to its reliance on proximity to humans to keep warm.
posted by acb
on Dec 3, 2012 -