Maintaining physical health brings a variety of benefits - including for the brain. A new study affirms that but also finds that lower IQ in teen years is correlated to a higher risk of dementia before the age of 60.
IQ doesn't really go up or down much so IQ at a young age isn't telling us much, but a study of one million young Swedish men included the data so it ended up being a factor.
How did small bands of nomadic Mongol horsemen unite to conquer much of the world within a span of decades? A whole book could be written on that, and it probably will be, if a new "Indiana Jones" movie gets made using Genghis Khan.
The reasons are numerous and involve many different things but climate change is a less-considered one. Yet researchers studying the rings of ancient trees in mountainous central Mongolia say his conquest was likely due to nice weather.
Research using satellite observations and ice thickness measurements gathered by NASA's Operation IceBridge is giving new insight into one of the processes causing Greenland's ice sheet to lose mass.
A team of scientists calculated the rate at which ice flows through Greenland's glaciers into the ocean, which gives a clearer picture of how glacier flow affects the Greenland Ice Sheet and shows that this dynamic process is dominated by a small number of glaciers.
Operation IceBridge has been measuring the thickness of many of Greenland's glaciers, which allowed researchers to make a more accurate calculation of ice discharge rates. Researchers calculated ice discharge rates for 178 Greenland glaciers more than one kilometer (0.62 miles) wide.
Aggressive marketing by raw milk proponents has included claims that raw milk is easier to stomach for for lactose-intolerant people but a pilot study from the Stanford University School of Medicine shows no meaningful difference in digestibility between raw and pasteurized milk.
It's no surprise that natural selection does not always take an evolutionary time scale.
When thousands of knights died during the Crusades at Acre, natural selection was being channeled. Yes, there were still other mechanisms of evolution but when the available pool of people is changed, positive selection is changed also. Pinpointing that on a time scale can be tough but there has been much research into the factors that have influenced the human genome since the end of the last Ice Age and a team of anthropologists, geneticists and archaeologists have analyzed ancient DNA from skeletons and found that selection has had a significant effect on the human genome even in the past 5,000 years.
Alan Turing was long famous in computer science and then became notable due to his sexuality and its controversy in England. Less well known is his work in biology and chemistry.
During World War II, Turing helped cracked the German Enigma Code, which made it possible to decipher enemy transmissions. After the war, he was convicted of homosexuality — a criminal offense in England — and sentenced to chemical castration. Shortly after his trial, and before he killed himself in 1954, he published a biology paper, "The Chemical Basis of Morphogenesis."
A faster and less expensive form of radiotherapy, called Stereotactic body radiotherapy (SBRT), for treating prostate cancer may come with a higher rate of urinary complications.
The standard external beam radiation therapy for prostate cancer is currently intensity modulated radiation therapy (IMRT). Stereotactic body radiotherapy delivers a greater dose of radiation per treatment than IMRT so patients receiving SBRT can complete an entire course of treatment in one to two weeks, compared to seven to nine weeks for IMRT.
The worldwide love affair with subsidized green energy is fading fast but that shouldn't be taken to mean the science is not solid.
In America, new power plants are difficult to get built and as a result the cost of electricity has gone up while the supply has gone down. Yet the government seems to still want to fast track alternative energy and regulations that allow small biomass plants may also help solve a grid problem that solar and wind energy only make worse.
Small biomass power plants that can fit on a farm and can be built at relatively low cost may be better than giant wind and solar plants that are opposed by environmental groups.
There's a cosmic war happening between
highly luminous O-type stars and nearby protostars in the Orion Nebula
The Orion Nebula is home to hundreds of young stars and even younger protostars known as proplyds. Many of these nascent systems will go on to develop planets, while others will have their planet-forming dust and gas blasted away by the fierce ultraviolet radiation emitted by massive O-type stars that lurk nearby.
Exaggerated health claims are not convincing the public, and "medical" marijuana has become something of a running cultural joke, but there is an upside to more pot - less cocaine use. Meth too, according to advocates at the RAND Drug Policy Research Center.
Or at least a group is correlating the two. Methamphetamine and cocaine consumption increased during the first half of the last decade and then dropped in the latter half. Marijuana use increased significantly during that time, according to a new report.
When advocates want governments to take over some aspect of society, the argument is often an economic one - the money saved will be a suitably cosmic number.
Yet in the trenches of government-run industries the reality is much different. Taxes are finite so committees learn to cut costs where they can. Older people, perhaps because they have already led full lives, are being denied proper access to cancer care, according to an editorial by Queen's University Belfast academic Professor Mark Lawler of the Centre for Cancer Research and Cell Biology.
The most popular test for ovarian cancer reports false-positives in 94 of 100 diagnosed cases but researchers from the University of Copenhagen and University College London have developed a method able to halve that.
When fully developed, the new test will spare a significant number of women from unnecessary worry and further testing. Furthermore, global health care providers stand to save substantial sums – just by including a test on a certain sugar molecule in tandem with the currently prevailing diagnostic test.
Calling H.P. Lovecraft: Galaxies in the vast empty regions of the Universe are actually aligned into tendrils.
A team of astronomers based at The University of Western Australia node of the International Centre for Radio Astronomy Research (ICRAR) has found short strings of faint galaxies in what were previously thought to be extremely empty parts of space. The Universe is full of vast collections of galaxies that are arranged into an intricate web of clusters and nodes connected by long strings. This remarkably organized structure is often called the 'cosmic web', with busy intersections of galaxies surrounding vast spaces, empty of anything visible to us on Earth.
Dr. Anne Glover, the European Union's first chief scientific adviser, said when she got the job that her first priority was to stop letting environmental pressure groups suppress science. Modern Europe fears what is new, is consumed with a naturalistic fallacy, and in addition engages in persecution of scientists (such as when they don't predict an earthquake) not seen in hundreds of years.
It's going to be a crippling problem. Plant pests and diseases have always evolved and picking an arbitrary point in time and declaring that science development must stop there will bring devastating results.
Regardless, it's still nice. No one is against fairness except people who have earned less of something and think others should reward them for it. And it may not even be altruistic. Northeastern University assistant professor of philosophy Rory Smead suggests another, darker origin behind fairness. Spite.
How can you find a gay person?
It's easy, just look on television. After the successes of "Will & Grace" and "Modern Family", networks have been putting gay characters everywhere they can. When the new comedy series "Whitney" flagged in the ratings, they even turned a married straight may gay because executives apparently think people want to watch gay characters on sit-coms rather than funny ones. The cancellation of "Sean Saves the World" shows that isn't true.
Outside network television gimmicks and stereotypes, can you really tell if someone is gay? The phenomenon called "gaydar" is colloquially confirmed, course, but those are in obvious cases. Can someone tell if the other person does not want it to be known they are gay?
Harvard stem cell scientists have successfully converted skins cells from patients with early-onset Alzheimer's into the types of neurons that are affected by the disease, making it possible for the first time to study this leading form of dementia in living human cells. This may also make it possible to develop therapies far more quickly and accurately than before.
Just like adults, children as young as 3 tend to judge an individual's character traits, such as trustworthiness and competence, simply by looking at the person's face, new research shows. And they show remarkable consensus in the judgments they make, the findings suggest.
The research, led by psychological scientist Emily Cogsdill of Harvard University, shows that the predisposition to judge others based on physical features starts early in childhood and does not require years of social experience. The study is published in Psychological Science, a journal of the Association for Psychological Science.
Many breast cancer survivors experience fatigue and other debilitating symptoms that persist months to years after their course of treatment has ended.
Now researchers at the Winship Cancer Institute of Emory University have found clues that may explain how these symptoms can linger. Chemotherapy, one of the major treatments for breast cancer, can leave a long-lasting epigenetic imprint in the DNA of breast cancer patients' blood cells. That imprint is associated with biological signs of inflammation up to six months after the completion of treatment. Inflammation in turn is believed to cause symptoms like fatigue.
The findings are now published online in the journal Brain, Behavior and Immunity.