Here's an incredible compilation with air force jets, doing some stunning low altitude passes, and even breaking the sound barrier while doing it. It's so beautiful, that it sends shivers down your spine! Enjoy!

This guy is dumb enough to jump over the rail crossing barrieres without even looking. This was such a close call that the train actually clips his shoe! Yeah...it doesn't get any closer than this. The guy didn't come back to get his shoe, though

There seems to be a common point between drivers all around the world. Whatever the country there will always be some that think they can outsmart everyone and get away with it. Here you can see exactly this kind of behavior: Drivers trying to pass through barrier-pillars in Manchester, England. All I can say is: OUCH! Damn pillar! Also check out this Road Intersection in India. It's stunning.

Here's a cool test video of a huge dump truck going at almost 90 km/h. It weighs 7 and a quarter tons! But the real star of this video is the concrete barrier which stopped that truck dead instantly! Amazing!

The particles of cobalt-chromium can cause DNA damage even if they do not come physically into contact with the cells. The nano-particles manage to damage the DNA of cells protected by a barrier made up of cellular membranes, without physically entering into contact with the cell, but rather through a multitude of chemical signals. This was found in a study coordinated at the Bristol Implant Research Center, proving that it brings out a new risk associated with nanotechnology, but also the opportunity to exploit this behavior in an innovative way. Nano-particles are now widely used. In surgery, for example, are an integral part of prostheses and implants. The research conducted so far on the risks of nanoparticles, however, relates mainly to the effects of direct exposure, while very little is known about what can cause the indirect exposure. In the new study, researchers have wondered if a barrier device was able to protect cells from the effects of nano-particles consisting of chromium and cobalt in the tissues of the clothes and orthopedic implants. The researchers interposed a barrier between nanoparticles formed out of multilayer chromium-cobalt (in quantities thousands of times greater than those with whom we come in contact normally) and a culture of human fibroblasts (connective tissue cells). Although nano-particles have not managed to cross the membrane, the fibroblasts had DNA mutations which were ten times more than the control fibroblasts. According to scholars, the effect is due to chemical signals between the cell membrane and fibroblasts. If the lines of communication between them are broken, the rate of DNA damage returned to normal.

This study researched killing cancer cells with nano-magnets, with the same principle as a microwave oven. The study of nano-particles applied to biomedicine continues to give interesting results, as research is still in its infancy. Through their work, the chemists from the university of Cagliari are now investigating some of the possibilities opened by this field. One is to use magnetic particles to convey the drugs only to the diseased cells, the other is to drive up the tumor and then force them to oscillate under the control of a variable magnetic field, thereby heating the target cells, just like a microwave oven does with the water molecules contained in food. This second mechanism exploits hyperthermia. It appears that cancer cells can be destroyed by beeing brought to a temperature of 42.5 degrees Celsius for about half an hour. In order arrive at the place desired, the particles must be incorporated into liposomes, hollow microspheres formed by lipid bilayers (for which reason they are called "magneto-liposomes"), which are able to overcome the barrier of cells. They must have a diameter of about 20 nanometers. Larger could indeed block blood vessels, while smaller particles may be "eaten" by macrophage cells which are in charge with the elimination of foreign bodies. Currently, the research team is working on the synthesis of particles and study of their structural and magnetic properties. Currently these are being built in oxide of iron or iron cobalt. The latter are more manoeuvrable, because their magnetic properties depend strongly on the direction along which the field is applied to (property known as magnetic anisotropy).