Rain cosmic - Debris sub-atomic

In order to define the profane what is a cosmic ray, Etchegoyen uses a sports analogy: "Imagine a tennis player throwing sub-atomic particles throughout the universe.

Thousands of them bombard each square metre of the earth's surface at speeds near that of light. "Such particles, according Etchegoyen, is the most abundant around a hundred-crossing our bodies every second-but sometimes the tennis draws with more vigour and serves some nuclei heavier elements such as iron, unimaginable energies, landing on our planet at a rate of one per square kilometer every week, and others even faster and scarce rain that once a century ".

These, to penetrate the atmosphere, collide against the air molecules and break into a barrage of particles
secondary, which is called "cosmic rain", some have generated billions of them.

"The sub-atomic rubble crashed in turn against others, thus creating more branches. For when you touch land, rain is formed by billions of photons, electrons, muones and other electrically charged particles. Although the rays of energy low and moderate are well studied, the ultra-high energy remain a mystery. "

Nano-car with molecules and nanotubes

If a virus of average size measured hundred nanometers, is even more diminutive the gimmick built by a team of U.S. experts in nanoscience, coordinated by Professor James Al. Tour of Rice University.

This is a vehicle of just 3 nanometers long and 2 wide, that is, approximately 20,000 times smaller than the thickness of a human hair. It is made from cylindrical molecules formed by carbon atoms, a whole revolution, given the difficulty carbon nanotubes unite among themselves and with other components.

For now, nano-car can move slightly on a surface atoms of gold when it receives a microdescarga electric, but its creators plan to give it an engine of photons to move faster.

Why us blind flash?

All the light that reaches our eyes stimulates substances in a protein called purple or retinal Rhodopsin.
Specifically, their molecules react decomposing, giving rise to an electrical impulse that is transmitted to the brain via the optic nenio.

If the brightness is normal, our retinas have enough rodopsina to function smoothly.
By contrast, when a flash is affected by photographic or other overdose photon-like the one that occurs to look directly at the sun, these molecules stimulate the photochromic nenio excess, which produces a saturation point.
The blindness is, therefore, the time spent in the back of retinal purple fogonazo.