Inspired by this embryonic induction mechanism, Ingber and Basma Hashmi, a Ph.D. candidate at SEAS who is the lead author of the current paper, set out to develop a way to engineer artificial teeth by creating a tissue-friendly material that accomplishes the same goal. Specifically, they wanted a porous sponge-like gel that could be impregnated with mesenchymal cells, then, when implanted into the body, induced to shrink in 3D to physically compact the cells inside it.
A new dinosaur species found in Portugal is one of the largest carnivorous dinosaurs from the Jurassic period - and may be the largest land predator discovered in Europe - 30 feet long and weighing up to 5 tons.
Scientists discovered bones belonging to this dinosaur north of Lisbon. They were originally believed to be Torvosaurus tanneri, a dinosaur species from North America. Closer comparison of the shin bone, upper jawbone, teeth, and partial tail vertebrae suggest to the authors that it may warrant a new species name, Torvosaurus gurneyi.
Research in The New England Journal of Medicine and Human and Molecular Genetics journals finds that mutation in the STAG3 gene is the major cause of human fertility disorders, as it provokes a loss of function of the protein it encodes.
STAG3 encodes a meiosis-specific subunit of the cohesin ring, the biological process through which, from a diploid somatic cell, a haploid cell or gamete is produced.
Cohesins are protein complexes that bind two straps of DNA and are implicated in its repair, replication and recombination, as well as in its chromosomal stability, transcription regulation, stem-cell pluripotency, and cell differentiation.
Genetic study in a family
Soybeans are a tremendously successful crop and a new study that traced the genetic changes in varieties over the last 80 years of soybean breeding found that increases in yield gains and an increased rate of gains over the years are largely due to the continual release of greater-yielding cultivars.
Some are concerned that converging on optimal crops for each region might be a bad thing but plentiful food tells a different story.
University of Arizona researchers snapped images of a planet outside our solar system with an Earth-based telescope using essentially the same type of imaging sensor found in digital cameras instead of an infrared detector. Although the technology still has a very long way to go, the accomplishment takes astronomers a small step closer to what will be needed to image earth-like planets around other stars
NASA has successfully concluded a remotely controlled test of new technologies that would empower future space robots to transfer hazardous oxidizer – a type of propellant – into the tanks of satellites in space today.
Concurrently on the ground, NASA is incorporating results from this test and the Robotic Refueling Mission on the International Space Station to prepare for an upcoming ground-based test of a full-sized robotic servicer system that will perform tasks on a mock satellite client.
Collectively, these efforts are part of an ongoing and aggressive technology development campaign to equip robots and humans with the tools and capabilities needed for spacecraft maintenance and repair, the assembly of large space telescopes, and extended human exploration.
Evolutionary biologists have long considered bird song to be an exclusively male trait, resulting from sexual selection. A new paper says that's not the whole story.
It doesn't turn Darwin's theory of sexual selection on its head, but it does mean there is more to the story than what Darwin proposed. Sexual selection has played a major role in the evolution of elaborate bird song but other selection pressures or processes have also probably played a role, especially at the initial stages of its evolution, the authors note.
Frequent Facebook users also share a greater risk of eating disorders, according to a new psychology paper.
The small sample used 960 college students (naturally) and determined that more time on Facebook was associated with higher levels of disordered eating. Females who placed greater importance on receiving comments and "likes" on their status updates and were more likely to un-tag photos of themselves and compare their own photos to friends' posted photos reported the highest levels of disordered eating.
To begin, an example of failed humor. Two friends in their 20s (called ‘L’ who is female, and ‘R’ who is male) are conversing :
L: “What did the big cup say to the little cup?”
R: (sarcastically) “I’m bigger than you?”
L: “No, Nothing. Cups can’t talk”.
R: (completely ignoring L) “I can hold more water than you?”-->
While Barbie was once as stereotypical as G.I. Joe, in modern years she can 'be anything.' Ken is still kind of annoying, however.
Yet to some it is not enough. Barbie must go. You won't be surprised to find that an article in Sex Roles, which touts itself as "an interdisciplinary behavioral science journal offering a feminist perspective", finds that Barbie is still holding girls back. You can save yourself all the heteronormative jargon about objectification theory and just read this overview.
Analysis of the wood from three 17th century shipwrecks in the Baltic Sea, the Ghost wreck, the Crown and the Sword, showed high concentrations of sulfur and iron using X-ray fluorescence (XRF) scanning.
Scientists from the same team have previously reported large amounts of sulfur and iron accumulation in the warship Vasa. In that study, the scientists found an outbreak of acidity and sulphate salts on the surface of the hull and other wooden objects.
There is a naive belief among some advocates that if people just had more money, their problems would be solved. Yet the saying 'money does not solve everything' exists as a truism for good reason.
Less worry about basic needs is obviously good for society - in developing nations, farmers that were able to use science and technology to be competitive with Europe and America showed dramatic improvements for their own families and their communities - and once basic needs are met there is more time to focus on education and culture. In America, this was accomplished in the last century by providing cheap electricity for all.
In a new Hubble telescope image, spiral galaxy ESO 137-001 is zooming toward the upper right, in between other galaxies in the Norma cluster located over 200 million light-years away.
The road is perilous: intergalactic gas in the Norma cluster is sparse, but so hot at 180 million degrees Fahrenheit that it glows in X-rays.
The spiral plows through the seething intra-cluster gas so rapidly, at nearly 4.5 million miles per hour, that much of its own gas is caught and torn away. Astronomers call this "ram pressure stripping." The galaxy's stars remain intact due to the binding force of their gravity.
A comparison of two hospitals and pertussis, one of which followed standard procedures and another that implemented a physician opt-in order initially and then a standing order for new mothers to receive the tetanus toxoid, reduced diphtheria toxoid and acellular pertussis vaccine (Tdap) before discharge, found that there was a 69% increase in the new mothers' pertussis vaccination rate, providing protection for themselves and their newborns against the disease, commonly known as whooping cough.
At age 6, Mozart performed at the court of the Prince-elect
Maximilian II of Bavaria. At age 8, Joy Foster represented Jamaica in table
tennis at the Caribbean championships in Trinidad.
What do the brains of these two child prodigies have in common?
There is good news for smokers; a cigarettes is apparently no more harmful for us than a chicken wing.
Or it's bad news for those Paleo diet people - they might as well be smoking cigarettes.
Or if you have seen scare journalism and miracle vegetable claims based on population statistics for more than a few years, you just take the whole thing with a grain of salt (but not too much salt!) and keep doing what you are doing.
NEW YORK (March 4, 2014) -- Terminal cancer patients who receive chemotherapy in the last months of their lives are less likely to die where they want and are more likely to undergo invasive medical procedures than those who do not receive chemotherapy, according to research in this week's BMJ. The findings underscore a disconnect between the type of care many cancer patients say they want and the kind they receive, and highlight the need for clearer and more balanced discussion of the harms and benefits of palliative chemotherapy at the end of life by doctors, patients and families, the study authors say.
They hitchhike with us under the soles of our shoes and muddy car tires. Harsh and cold climates do not seem to stop alien plants from establishing themselves in high altitudes, where they now successfully penetrate the alpine vegetation, according to a study at Umeå University in Sweden and the University of Antwerp, Netherlands.
"Alien plants often gain advantages in their new environment because they lack natural enemies, and in this case the lack of strong competitors amongst alpine plants may be the key to success for generalist native species," says ecologist Ann Milbau, assistant professor at the research station Climate Impacts Research Centre in Abisko, Sweden.
It may seem like social media is a great way to engage people, but outside creating a flash mob of dancers or overthrowing an African dictatorship and replacing it with another one, armchair activists aren't accomplishing much.
'Talk is cheap', the saying goes, and retweets and likes are even cheaper.