The "Baker" A-bomb exploded underwater on July, 25, 1946 8:35AM. With 21 Kilotons of force, trust me, you do not want to be near it.

The Atomic Cannon detonated at the Nevada Test Site in 1953, showing the atom bomb detonation and weapon effects. It exploded with a force of 15 kilotons. At this force it is actually called a tactical atomic bomb. This video sequence is from "Trinity and Beyond - The Atomic Bomb Movie"

Twenty years after the first partially successful attempt to cold fusion, a new experiment seems to have reopened the hopes of obtaining nuclear reactions at low energy (LENR low-energy nuclear reactions). This was announced by a team of researchers led by Pamela Mosier-Boss of the Space and Naval Warfare Systems Center San Diego (California), with a study presented at the annual meeting of American Chemical Society, the first visible evidence of the production of neutrons, the particles subatomic whose presence demonstrates the atomic reaction occurred. It was 1989 when Martin Fleischmann and Stanley Pons showed that it has obtained experimentally the Cold Fusion, arousing great outcry in the scientific community. Fusion is the reaction that takes place inside of stars, their source of energy, able to reproduce in the laboratory at room temperature this process would be an amazing achievement. Further research then disappointed initial expectations: the rare attempts (for example, those of 2000 and 2002) to reproduce the results of 1989 and have not convinced the path of nuclear reaction at low energy has not proved viable as an alternative to "clean" nuclear fission, which is based on the common operation of nuclear power.

A new instrument to simultaneously measure the magnetic field and the atomic structure of matter at the nanoscale has been developed. The applications of this are future generations of high-density memories Snapshots of the weakest and microscopic magnetic fields generated by just a few molecules of a nanometer (billionth of a meter). The researchers have obtained the S3 Center of the National Institute for the Physics of Matter (INFM-CNR) of Modena and the University of Modena . This is a scanning microscope combined with a new highly sensitive magnetic sensor. The microscope scans close with his point - made up of a few atoms - the area of the test and how it relates to the roughness with a resolution of several nanometers. Beside the point, the sensor records the magnetic field intensity, but with high detail ( millionth of a meter). In this way the researchers were able to get together for the first time, images of atomic structure and magnetic properties of a thin layer of nano-magnet on a support of silicon. "The microscope allows us to measure directly the properties of nano-molecular magnets on the surface, even at temperatures close to absolute zero, to minus 270 degrees," says Marco. "Above all," says the researcher, "it helps us to understand the magnetism on the molecular scale."

The brain responds to stimuli, tactile and visual contradiction in delaying the processing of information that comes from the skin. A fly is laying on the right elbow. Slight itching, moving vision towards the elbow, identification of the intruder and its position and, finally, blow. This reaction is not as instantaneous as you can imagine. Indeed, the brain seems to delay affixed aware of the tactile perception, as reported a study in Current Biology Group for Research in Cognitive Neuroscience (Grnc) in Barcelona. The brain is often having to generate rapid responses integrating stimuli that produce information in contradiction: if, for example, the subject has crossed his arms and brings his right arm on the left side and left arm on the right side, his hands will be in a position that is reversed from the original location. In this case, the brain must be able to correctly integrate the information of the tactile stimulus (for example pinch) on the right hand, although the visual stimulus comes in fact from the left. To avoid mistakes the brain needs time to make a realignment of the information space of two different maps: that rof the body and one that covers everything else. To understand how the mechanism works, researchers have assessed the response of 32 university students to a series of visual and tactile stimuli. Each student has been subjected to 600 tests. "First we asked participants to cross the arms, so that the position of hands was in conflict with the anatomical position" says Salvador Soto-Faraco, one of the authors of the study, "we have stimulated one of two hands." Few tenths of a second later, a small light (visual stimulus) I had left or right. Both the tactile stimuli that those visual products were in a totally random. In addition, the flash of light could be generated 60 or 200 milliseconds after the tactile stimulus. In order to assess whether the time elapsed between the two stimuli does influence or not the answer.

New mechanisms based on mercury and aluminum allow an accuracy ten times higher than the current systems. New generation atomic clocks have been developed at the National Institute of Standards and Technology (Nist), an international collaboration which includes Luke Lorini also of the National Research Metrologica (Inrim) in Turin. The research appeared in Science magazine, and showed the ability to measure frequencies, and thus time, with 17 significant digits, reaching an unprecedented accuracy. The two new atomic clocks are based on atoms of mercury and aluminum. The first system had already been submitted in 2000, but the current version is definitely improved, the mechanism based on aluminum represents a completely new system.

No more black and white images: a new electronic tool will observe the chemical species to the wavelengths of visible The color images provided by an ordinary microscope can not make a resolution at the level of individual atoms, while the electronic microscopes, capable of atomic resolution, providing black and white images. In these images different atoms appear as different shades of grey. Now, an electron microscope of a new generation, recently designed and installed at Cornell University and the subject of a study published in Science, will obtain color images at atomic resolution.

Filming particles is now possible. It was done for the first time by a group of Swedish researchers using extremely short pulses of light Getting images of electrons that do not appear to "move" has been impossible because of the speed of these microscopic particles. But a group of researchers in the Faculty of Engineering at the University of Lund (Sweden) now has found a way to shoot the movement of an electron using an innovative technique that provides for the use of flash light of extremely short duration.