Headache sufferers either benefit from acupuncture or they mentally fool themselves into thinking acupuncture helps, according to two separate systematic reviews by Cochrane Researchers which show that acupuncture is an effective treatment for prevention of headaches and migraines, but faked procedures, in which needles are incorrectly inserted, can be just as effective.
In each study, the researchers tried to establish whether acupuncture could reduce the occurrence of headaches. One study focused on mild to moderate but frequent 'tension-type' headaches, whilst the other focused on more severe but less frequent headaches usually termed migraines. Together the two studies included 33 trials, involving a total of 6,736 patients.
The fossil of a lizard-like New Zealand reptile has been identified by a team of scientists from University College London, University of Adelaide, and the Museum of New Zealand Te Papa Tongarewa. The fossil, dating back 18 million years, has triggered fresh arguments over whether the continent was fully submerged some 25 million years ago.
The endangered New Zealand tuatara (Sphenodon) is a lizard-like reptile that is the only survivor of a group that was globally widespread at the time of the dinosaurs. The tuatara lives on 35 islands scattered around the coast of New Zealand, mainland populations having become extinct with the arrival of humans and associated animals some 750 years ago.
Cosmic-rays detected half a mile underground in a disused U.S. iron-mine can be used to detect major weather events occurring 20 miles up in the Earth’s upper atmosphere, according to a new study published in Geophysical Research Letters and led by scientists from the UK’s National Centre for Atmospheric Science (NCAS) and the Science and Technology Facilities Council (STFC).
The study shows how the number of high-energy cosmic-rays reaching a detector deep underground, closely matches temperature measurements in the upper atmosphere (known as the stratosphere).
The consensus among scientists has been that while much of the globe has been getting warmer, a large part of Antarctica – the East Antarctic Ice Sheet – has actually been getting colder. Not so, say Eric Steig, a University of Washington professor of Earth and space sciences, and colleagues in Nature.
Galaxies are the building blocks of the Universe. Each of them comprises some hundred billion radiant stars, such as our sun, which extend across about 50,000 light years. Every galaxy is embedded in a spherical halo made of dark matter that cannot be seen but is detected through its massive gravitational attraction. The exact nature of this matter is still unknown.
Scientists have finally solved one of the major mysteries of star formation - how very massive stars form without blowing themselves apart in the process. According to star formation theory and previous simulations, the internal pressure created as a very massive star begins to shine should counteract the gravitational force pulling more material in, blowing away the outer layers of the star before it can get sufficiently massive.
Observations, however, show that stars exist with masses above the theoretical threshold and often coexist with other massive stars in binary systems - providing a mystery to astrophysicists until now.
A research team in Portugal and the US has found for the first time nicotine receptors in the taste buds. In fact, although most of the toxicity of smoking is linked to other components, it is nicotine that leads to smoking addiction and until now it was believed that this substance had to migrate into the brain to bind its specific receptors and provoke its effects.
People on low-carbohydrate diets are more dependent on the oxidation of fat in the liver for energy than those on a low-calorie diet, researchers at UT Southwestern Medical Center have found in a small clinical study published in Hepatology.
Although the study was not designed to determine which diet was more effective for losing weight, the average weight loss for the low-calorie dieters was about 5 pounds after two weeks, while the low-carbohydrate dieters lost about 9½ pounds on average.
Glucose, a form of sugar, and fat are both sources of energy that are metabolized in the liver and used as energy in the body. Glucose can be formed from lactate, amino acids or glycerol.
A new report, co-authored by a University of Hertfordshire academic, which will be launched this Thursday (22 January), has revealed that girls are more likely to have new technologies at home than boys and it is mothers rather than fathers who assist them.
The Learning in the Family report which looked at how families are involved in children’s learning, was funded by Becta, commissioned by Intuitive Media Research Services and co-authored by Robert Hart of Intuitive Media and Professor Karen Pine, at the University’s School of Psychology. They conducted two online surveys with a sample of 4,606 children aged six to fourteen, going into more depth with a further 2,535 children and then interviewed twelve families.
It has been difficult to prove that fast-swimming sperms have an advantage when it comes to fertilizing an egg but a research team at Uppsala University say that unfaithful females of the cichlid fish species do influence the males’ sperms - increased competition leads to both faster and larger sperms, and the research findings published in PNAS say that the much mythologized size factor does indeed count.
The findings also show that the speed and the size of sperms are closely related: larger sperms are faster. These sperms swim faster thanks to the greater power of a larger flagellum, but faster sperms also need to have a larger store of energy, which in turn results in larger sperms.
