Study Finds Atrazine Pesticide Doesn't Impact Aquatic Plant Life

A recent study found that the herbicide atrazine, common for weed control in corn and sorghum...

College Student Marijuana Use Highest Since Survey Began

Both daily and less frequent use of marijuana among college students has risen sharply, to the...

Neuron Responsible For Alcoholism Found

Scientists have pinpointed a population of neurons in the brain that influences whether one drink...

Frogs Make Irrational Choices - And What Means For Understanding Animal Mating

In the attempt to choose a mate, it's no surprise that females will select the more "attractive"...

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Cancer impacts millions of lives for the worse every year. Despite this difficult reality, it appears that we are becoming increasing successful in our efforts to stem the tide of patients who fall victim as time goes on.

According to a recently published report in the journal Cancer Research, cancer mortality rates have been steadily dropping over the last three decades.

“Our efforts against cancer, including prevention, early detection and better treatment, have resulted in profound gains, but thesegains are often unappreciated by the public due to the way the data are usually reported," said Eric Kort, M.D., one of the study’s authors and former research scientist at Van Andel Research Institute (VARI) in Grand Rapids, Mich.
Diesel and gasoline fuel sources both bring unique assets and liabilities to powering internal combustion engines. But what if an engine could be programmed to harvest the best properties of both fuel sources at once, on the fly, by blending the fuels within the combustion chamber?

Such an engine just might be possible thanks to the University of Wisconsin-Madison engine research group headed by Rolf Reitz. The research team is developing a diesel engine that produces significantly lower pollutant emissions than conventional engines, with an average of 20 percent greater fuel efficiency as well. 

Researchers who want to include surgeries in studies have to make first contact through non-medical administration staff who act as roadblocks, says a group of researchers whose planned leg ulceration study was hamstrung by a physician recruitment rate of 2% and who have published the reasons why so many surgeons did not participate.

The qualitative information, featured in the open access journal BMC Medical Research Methodology, may be of use to those designing trials of their own.  Given the current health care debate in America, another layer of bureaucracy and the impact on research studies is one facet of the discussion that has been least considered. 
Early modern humans living on the southern Africa coast employed pyrotechnology, the controlled use of fire, 72,000 years ago,  to increase the quality and efficiency of their stone tool manufacturing process, according to a report in Science.

The international team of researchers deduces that "this technology required a novel association between fire, its heat, and a structural change in stone with consequent flaking benefits." Further, they say their findings ignite the notion of complex cognition in early man.

If their findings hold up, it could mean humans' ability to solve complex problems may have occurred at the same time their modern genetic lineage appeared, rather than developing later as has been widely speculated.
A real life Alice In Wonderland story is a little closer to reality now that researchers in China have created the first tunable electromagnetic gateway.

In a new paper,  researchers from the Hong Kong University of Science and Technology and Fudan University in Shanghai have described the concept of a "a gateway that can block electromagnetic waves but that allows the passage of other entities" like a "'hidden portal' as mentioned in fictions."

The gateway uses transformation optics and an amplified scattering effect from an arrangement of ferrite materials called single-crystal yttrium-iron-garnet that force light and other forms of electromagnetic radiation in complicated directions to create a hidden portal. 
The green of a tree's leaves is from the larger proportion of the chlorophyll pigment in the leaves.  As days get shorter, less chlorophyll is  produced and green is no longer dominant because yellow xanthophylls and orange carotenes are also present in the chloroplasts.

But why will the leaves of some trees be red in America yet yellow in Europe?