The newly discovered asteroid 2007 TU24 is passing within 1.4 lunar distances, or 334,000 miles, of Earth today.

The asteroid, estimated at between 150 and 600 meters in diameter, was discovered by the University of Arizona’s Catalina Sky Survey in October 2007. It poses no threat to Earth, but its near approach gives astronomers a golden opportunity to learn more about potentially hazardous near-Earth objects. And conspiracy theorists a chance to speculate on NASA.

Some people are genuinely concerned about this asteroid causing an End of Life event on Earth. Not to worry.

A University of Rochester scientist discovered that the toxins in cigarette smoke wipe out a gene that plays a vital role in protecting the body from the effects of premature aging. Without this gene we not only lose a bit of youthfulness – but the lungs are left open to destructive inflammation and diseases such as chronic obstructive pulmonary disease (COPD) and lung cancer.

By identifying the Sirtuin (SIRT1) gene’s role in pulmonary disease, scientists also hope to find ways to restore it and jump-start lung healing. They’ve begun testing the powerful antioxidant resveratrol, which is extracted from red grape skins, to develop a treatment to target SIRT1 and reverse lung damage, or at least enhance the way standard COPD therapies work.

In transportation, road traffic contributes the most to global warming, aviation is second, railways are negligible and shipping actually has a net cooling effect on the earth’s climate, according to a study published recently.

But we can't simply switch to shipping and cure global warming. Shipping emits large portions of SO2 and NOx, which both have cooling effects, but this effect will diminish as the gases don’t live long in the atmosphere. After a few decades, the long-lived CO2 will dominate, giving shipping a warming effect in the long run.

You’re more likely to give things a favorable evaluation when you’re happy and a negative evaluation when you’re sad. But how does mood influence your choices among items?

A new study in the February issue of the Journal of Consumer Research people finds that consumers in a good mood are more likely than unhappy consumers to choose the first item they see, especially if all the choices are more or less the same.

“It is surprising that little research has been done to examine how affect influences comparisons and choices,” say Cheng Qiu (University of Hong Kong) and Catherine W. M. Yeung (National University of Singapore).

A new report by the Arizona Arts, Sciences, and Technology Academy (AASTA) found that research in astronomy, planetary sciences, and space sciences (APSS) pumped over $250 million into Arizona’s economy in 2006 alone.

That's real money but it's not all balloons and ponies for Arizona. There are threats to that economic engine and it's what you can probably guess - the instability of federal funding and competition from other locations - but it's also things you might not guess, like light pollution from residential and commercial development and lingering memories of environmental and political activism.

The new Center for Vaccine Awareness and Research at Texas Children’s Hospital announced that it will implement the nation’s first major “cocoon strategy” vaccination program to protect newborn infants from the life-threatening infection pertussis, more commonly known as whooping cough.

High speed trains must, and will become an essential component of the U.S. transportation system during the next 20 years. This seems to be obvious, but is something that the (lack of) leadership in Washington D.C. has yet to seriously consider.  A combination of lack of vision, deeply entrenched vested interests, a troubled Amtrak system and a ‘not invented here’ mindset has combined to allow the U.S. to be woefully behind the curve when it comes to both rail transport and an intelligent, integrated national transportation system. Flying has become an extremely unpleasant and unreliable travel experience. In addition it is a large contributor to greenhouse gas emissions into the atmosphere.  Predicated on cheap oil, high prices and customer service, the airline business must now operate in an environment of expensive oil, low prices and a general lack of quality customer service not to mention cancellations and poor on-time performance. At the other end of the transportation spectrum, automobile travel is undergoing change due to increasing price of gasoline.  Gasoline prices consistently over $3 means that in addition to looking for a high MPG when buying a new car, people will think twice before making a long road trip and will increasingly find that commuting by car is adversely affecting the household budget.

Dr. Shaohua Xu, Florida Tech associate professor of biological sciences, has an original theory of the origin of Alzheimer’s Disease and has earned a $150,000 grant from Space Florida to test it. The grant was matched with $30,000 from NASA’s Aerospace Medicine and Occupational Health Branch.

He is also the sole medical researcher at the State of Florida’s Space Life Sciences Laboratory at Kennedy Space Center (KSC) and the research is being conducted both at the university and KSC.

Xu’s theory, both controversial and praised, involves the start of the disease when molecules of a normal brain cell protein called “tau” do something very abnormal: they join together to form tangled fibers that the cell cannot remove.

COX-2 inhibitors are having a tough year. Vioxx was withdrawn voluntarily a few months ago and now Celebrex, the arthritis drug that blocks pain by inhibiting the COX-2 enzyme, has been shown in laboratory studies to induce arrhythmia, or irregular beating of the heart, via a pathway unrelated to its COX-2 inhibition.

University at Buffalo researchers discovered this unexpected finding while conducting basic research on potassium channels.

Celebrex (Celecoxib) has been taken by over 27 million patients since its approval by the FDA in 1998. The new research found that low concentrations of the drug, corresponding to a standard prescription, reduced the heart rate and induced pronounced arrhythmia in fruit flies and the heart cells of rats.