Dr. Hal Arkes in the department of psychology at Ohio State University has done extensive studies on the sunk-cost fallacy after he became interested for his personal involvement in politics twenty years ago. His most recent studies look at finding new ways to minimize the fallacy through interventions.

With the help of undergrads and some others at OSU Arkes gives volunteers a scenario having to do with an airplane company and the construction of a $10 million Radar Blank Plane. If the plane has been 90 percent completed, meaning millions of dollars already having been spent, but another company came up with a better version making the almost finished product “grossly inferior,” should the last 10 percent of the budget be spent anyways? Most of the testers said “yes.”

President Bush is quoted in 2005 as saying “we owe them something…We will finish the task that they gave their lives for,” about the soldiers who have died since the 9/11 terrorist attack on the World Trade Center, exemplifying a mode of thinking that appeals to everyone in some way. Most people know this notion as an expenditure made in the past that cannot be modified, or the sunk-cost fallacy.

A recent study in the July issue of Psychological Science tested the relationship between older and younger adults through an individuals’ commitment relating to the “sunk-cost fallacy,” in matters of money.

The Tunguska event is regarded as one of the biggest natural disasters of modern times. On 30 June 1908 one or more explosions took place in the area close to the Tunguska River north of Lake Baikal. The explosion(s) flattened around 80 million trees over an area of more than 2000 square kilometres.

The strength of the explosion is estimated to have been equivalent to between five and 30 megatons of TNT. That is more than a thousand times as powerful as the Hiroshima bomb.

This almost unpopulated region of Siberia was first studied in 1927 by Professor Leonid A. Kulik. There are a number of different theories about what caused the catastrophe. However, the majority of scientists assume that it was caused by a cosmic event, such as the impact of a meteorite, asteroid or comet. If it had exploded in the atmosphere just under five hours later, St. Petersburg, which was the capital of Russia at that time, would have been completely destroyed because of the Earth's rotation.

hominin fossils are the most important materials for exploring human origins and evolution. Since most hominin fossils are incomplete, or filled with a heavy calcified matrix, it is difficult or often impossible to reconstruct the endocast in a real fossil without destroying it.

Accordingly, traditional methods limited the study of human brain evolution. CT can explore fossils in a noninvasive way by transforming a real fossil into a virtual object, and make it possible for paleoanthropologists to extend the study of fossil specimens from the exterior to the interior.

Just this once, anti-fishing organizations can fall back on capitalistic economics to make their case - with huge increases in fuel costs, it may be time to have government-run fisheries rather than spend more money on fuel subsidies currently given to fishing fleets.

In addition, it would actually save money to invest in re-training fishers, says University of British Columbia fisheries economist Rashid Sumaila, a 2008 Pew Fellow in Marine Conservation.

Dramatic fuel price increases over the past weeks have sparked large-scale protests by fishers around the world. In France, fishers set up blockades at several ports while Japanese squid fishing boats halted operations for two days. Similar events have taken place in Australia, Nigeria and the Philippines.

University of Florida and Florida Institute of Technology engineering researchers have narrowed the search for the source of X-rays emitted by lightning, a feat that could one day help predict where lightning will strike.

"From a practical point of view, if we are going to ever be able to predict when and where lightning will strike, we need to first understand how lightning moves from one place to the other," said Joseph Dwyer, a professor in the department of physics and space sciences at FIT. "At present, we do not have a good handle on this. X-rays are giving us a close-up view of what is happening inside the lightning as it moves."

Archaeopteryx is famous as the world's oldest bird, but reptiles were flying about some 50 million years earlier than that (225 million years ago), even before large dinosaurs roamed the Earth.

A new study of extinct reptiles called kuehneosaurs, by scientists from the University of Bristol, England, shows that these early flyers used extraordinary extensions of their ribs to form large gliding surfaces on the side of the body. The results were published today in Palaeontology.

Kuehneosaurs, up to 70 centimetres (two feet) long, were first found in the 1950s in an ancient cave system near Bristol. Their lateral 'wings' were always assumed to be some form of flying adaptation, but their aerodynamic capability had never been studied before.

Genomic imprinting is a mechanism that regulates gene expression in the developing fetus and plays a major role in regulating its growth. Research published in Nature Genetics by a team of international scientists has established an identical mechanism of genetic imprinting which evolved 150 million years ago.

"This paper shows that we share a common genetic imprinting mechanism which has been active for about 150 million years despite the differences in reproductive strategies between marsupials and humans," said Professor Geoffrey Shaw of the Department of Zoology at the University of Melbourne, a coauthor on the paper.

Penn State researchers say they can produce greener, less expensive hydrogen for fuel using water, solar energy and nanotube diodes that use the entire spectrum of the sun's energy.

Currently, the steam reforming of natural gas produces most of our hydrogen. As a fuel source, this produces two problems. The process uses natural gas and so does not reduce reliance on fossil fuels; and, because one byproduct is carbon dioxide, the process contributes to the carbon dioxide in the atmosphere, the carbon footprint.

Craig A. Grimes, professor of electrical engineering, says their process splits water into its two components, hydrogen and oxygen, and collects the products separately using commonly available titanium and copper. Splitting water for hydrogen production is an old and proven method, but in its conventional form, it requires previously generated electricity. Photolysis of water solar splitting of water has also been explored, but is not a commercial method yet.

A group of scientists has used deep ocean-floor drilling and experiments to show that volcanic rocks off the West Coast and elsewhere might be used to securely imprison huge amounts of globe-warming carbon dioxide captured from power plants or other sources. In particular, they say that natural chemical reactions under 78,000 square kilometers (30,000 square miles) of ocean floor off California, Oregon, Washington and British Columbia could lock in as much as 150 years of U.S. CO2 production.

Interest in so-called carbon sequestration is growing worldwide. However, no large-scale projects are yet off the ground, and other geological settings could be problematic. For instance, the petroleum industry has been pumping CO2 into voids left by old oil wells on a small scale, but some fear that these might eventually leak, putting gas back into the air and possibly endangering people nearby.