Cold fusion has been called one of the greatest scientific breakthroughs that might likely never happen. On the surface, it seems simple - a room-temperature reaction occurring under normal pressure. But it is a nuclear reaction, and figuring it out and getting it to work has not been simple, and any success in this area could ultimately - and seriously - change the world. Despite various claims of victory over the years since 1920, none have been able to be replicated consistently and reliably.

But there's buzz this week of a cold fusion experiment that has been replicated, twice. The tests have reportedly produced excess heat with roughly 10,000 times the energy density and 1,000 times the power density of gasoline.

The names involved are familiar: Italian entrepreneur Andrea Rossi has been claiming for several years that his E-Cat device produces heat through a process called a Low Energy Nuclear Reaction (LENR), and puts out more energy than goes in. In the past, Rossi didn't allow anyone to verify his device because he claimed his device was an "industrial trade secret."

Near-Earth asteroid 1998 QE2 is approaching the Earth-Moon system for a flyby on May 31st. There's no danger of a collision; at closest approach the asteroid will be 3.6 million miles away. Even at that distance, however, the 1.7-mile-wide space rock will be an easy target for mid-sized backyard telescopes. Using a 14-inch Celestron, Alberto Quijano Vodniza of Narino, Colombia took this picture of 1998 QE2 on May 17th:

The sunlit side of the asteroid will turn more squarely toward Earth during the first week of June. At that time it will reach a maximum brightness of 11th magnitude. NASA radars will be monitoring the flyby, too. "Asteroid 1998 QE2 will be an outstanding radar imaging target at Goldstone and Arecibo and we expect to obtain a series of high-resolution images that could reveal a wealth of surface features," says radar astronomer Lance Benner of JPL. "Whenever an asteroid approaches this closely, it provides an important scientific opportunity to study it in detail to understand its size, shape, rotation, surface features, and what they can tell us about its origin."

Stay tuned for updates and observing tips.

The moon will take the smallest of dips through the Earth's shadow in a minor eclipse tonight (May 24) and you can watch the lunar event live online via a webcast. The lackluster lunar eclipse will star in a free webcast by the Slooh Space Camera, which offers live views of the night sky via remotely operated telescopes. The eclipse webcast will begin at 11:37 p.m. EDT (0337 May 25 GMT).
You can watch the lunar eclipse webcast on SPACE.com courtesy of the Slooh Space Camera. The event comes on the heels of a "ring of fire" solar eclipse on May 10 and another partial lunar eclipse on April 25. Stargazing experts predict that tonight's eclipse won't be anywhere near as impressive as the other recent eclipses because only a tiny sliver of the May full moon will pass through the penumbra, the outermost part of Earth's shadow.

"It will thus be impossible to notice anything out of the ordinary concerning the moon's overall appearance," SPACE.com's skywatching columnist Joe Rao explained in a viewing guide today. "It will, in fact look like any other full moon."

Technologies are tools for doing or making things. They are a means to transform what nature has given into food, clothing, shelter, means of mobility, means of communication. Technology is a means to an end; it is not an end in itself. But when we stop perceiving technology as a means mediating between nature and human needs and elevate it to an end in itself, we falsely give it the status of a religion.

The Green Revolution bred seeds to respond to chemical fertilisers - they were called "miracle seeds". The father of the Green Revolution, Norman Borlaug, called the 12 people he sent across the world to spread chemicals by introducing new seeds his "wheat apostles". This is the discourse of religion, not of science and technology.

When the Green Revolution was introduced in India in 1965-66, no assessment was made of the impact chemical fertiliser will have on soil organisms, soil structure and the soil's water-holding capacity. No attempt was made to compare the yields of Green Revolution varieties and the outputs of indigenous varieties and mixed farming system. When we started to conserve native seeds through the Navdanya movement in 1987, we found many of the indigenous varieties outperformed the Green Revolution varieties in grain yield. They also outperformed them in total biomass yield - this really matters because while the grain is eaten by humans, straw is food for soil organisms and farm animals. Our work on mixtures and biodiverse systems of farming shows that as a system, indigenous biodiversity produces more food and nutrition per acre.

GPs can now refer patients with a common iron overload disorder for prompt treatment using an app that could see the end of paper based referrals.

In a world first, doctors developed a simple web based app that quickly identifies patients with hereditary haemochromatosis (HH) and refers them directly to the Red Cross blood service for therapeutic blood donation.

Under the old paper based system, patients often have to wait up to three months for paperwork to be completed, delaying much needed treatment and potentially putting them at risk of organ damage.

Twelve years of supersized earthquakes have contaminated GPS sites around the world, a new study finds.

The Global Positioning System is a network of satellites and ground stations that provide location information anywhere on Earth. Except for spots in Australia, western Europe and the eastern tip of Canada, every GPS site on the ground underwent small but important shifts since 2000 because of big earthquakes, according to a study published May 6 in the Journal of Geophysical Research: Solid Earth.

The research confirms that great earthquakes, those bigger than magnitude 8.0, can have far-reaching effects on the Earth's crust. And because GPS is critical for everything from calculating satellite orbits to sea level rise to earthquake hazards, scientists can't ignore these tiny zigs and zags, the researchers conclude.

"We have to find a way to deal with it," said Paul Tregoning, lead study author and a geophysicist at Australia National University in Canberra. "The community needs to work out how to find all the offsets, estimate them accurately and get everyone to agree on how to correct them," he told LiveScience.

Tregoning and his colleagues modeled the sudden jolts in Earth's crust from each of the 15 biggest earthquakes since 2000. They discovered that crust thousands of miles away from the faults had moved horizontally by as much as a tenth of an inch (a few millimeters). The model was checked against a few spots around the planet. On average, the earthquakes deformed the crust by a hundredth of an inch every year (0.4 millimeters a year) - about the width of the lead in a mechanical pencil.

"It's quite amazing to us that we can see this and detect this," Tregoning said.

These tiny effects won't make a difference to the GPS in cars or phones, or the tough little units carried by hikers and mountaineers. But scientists who need precise measurements to calculate sea level rise or satellite orbits should be concerned, Tregoning said.

In September, the U.S. government will fire into orbit a two-stage rocket from a Virginia launchpad. Officially, the mission is a scientific one, designed to improve America's ability to send small satellites into space quickly and cheaply. But the launch will also have a second purpose: to help the elite forces of U.S. Special Operations Command hunt down people considered to be dangerous to the United States and its interests.

For years, special operators have used tiny "tags" to clandestinely mark their prey - and satellites to relay information from those beacons. But there are areas of the world where the satellite coverage is thin, and there aren't enough cell towers to provide an alternative. That's why SOCOM is putting eight miniature communications satellites, each about the size of a water jug, on top of the Minotaur rocket that's getting ready to launch from Wallops Island, Virginia. They'll sit more than 300 miles above the earth and provide a new way for the beacons to call back to their masters.

A solar radiation storm is in progress on May 22nd following an M5-class explosion on the sun's western limb. The source of the flare, which peaked at 1332 UT, was departing sunspot AR1745. SOHO coronagraphs observed a magnificent CME emerging from the blast site.

Play the movie again. The speckles dancing across the image are caused by high-energy solar protons striking the CCD camera in SOHO's coronagraph. Those protons were guided toward Earth by magnetic field lines that connect our planet to the blast site. The rain of protons is what forecasters mean by a "radiation storm." This storm ranks S2 on NOAA storm scales.

A new rifle goes on sale on Wednesday, and it's not like any other. It uses lasers and computers to make shooters very accurate. A startup gun company in Texas developed the rifle, which is so effective that some in the shooting community say it should not be sold to the public.

It's called the TrackingPoint rifle. On a firing range just outside Austin in the city of Liberty Hill, a novice shooter holds one and takes aim at a target 500 yards away. Normally it takes years of practice to hit something at that distance. But this shooter nails it on the first try.

The rifle's scope features a sophisticated . The shooter locks a laser on the target by pushing a small button by the trigger. It's like a video game. But here's where it's different: You pull the trigger but the gun decides when to shoot. It fires only when the weapon has been pointed in exactly the right place, taking into account dozens of variables, including wind, shake and distance to the target.

Now they're just messing with us. Physicists have long known that quantum mechanics allows for a subtle connection between quantum particles called entanglement, in which measuring one particle can instantly set the otherwise uncertain condition, or "state," of another particle -- even if it's light years away. Now, experimenters in Israel have shown that they can entangle two photons that don't even exist at the same time.

"It's really cool," says Jeremy O'Brien, an experimenter at the University of Bristol in the United Kingdom, who was not involved in the work.

Such time-separated entanglement is predicted by standard quantum theory, O'Brien says, "but it's certainly not widely appreciated, and I don't know if it's been clearly articulated before."

Entanglement is a kind of order that lurks within the uncertainty of quantum theory. Suppose you have a quantum particle of light, or photon. It can be polarized so that it wriggles either vertically or horizontally.

The quantum realm is also hazed over with unavoidable uncertainty, and thanks to such quantum uncertainty, a photon can also be polarized vertically and horizontally at the same time. If you then measure the photon, however, you will find it either horizontally polarized or vertically polarized, as the two-ways-at-once state randomly "collapses" one way or the other.

Entanglement can come in if you have two photons. Each can be put into the uncertain vertical-and-horizontal state. However, the photons can be entangled so that their polarizations are correlated even while they remain undetermined. For example, if you measure the first photon and find it horizontally polarized, you'll know that the other photon has instantaneously collapsed into the vertical state and vice versa -- no matter how far away it is. Because the collapse happens instantly, Albert Einstein dubbed the effect "spooky action at a distance." It doesn't violate relativity, though: It's impossible to control the outcome of the measurement of the first photon, so the quantum link can't be used to send a message faster than light.