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Invisible mark

02.11.2000

The English firm "Smart Water" began to produce a novelty for forensics. This invention of Phil Cleary, a retired police officer, is a water-soluble mixture of different substances that glows in the rays of an ultraviolet laser.

A system is being installed in the apartment that sprays the intruding robber with this mixture. It is colorless, and traces of it on the skin and clothes are not visible, but it is almost impossible to wash them off. The composition is unique for each apartment, so by illuminating the suspect with a laser, you can find out exactly where he paid a visit.

The system is installed separately or in addition to the alarm system already in the house, and a noticeable sign is fixed at the front door, notifying potential robbers of a serious interference (criminals who read the press bypass such apartments).

An individual luminous mark is already being applied to motorcycles, cars, weapons and other valuable or dangerous movables. But in this case, the mixture is made insoluble so that rain does not wash it away.

In addition, explosives can be marked with the same compounds - the nature of the glow of the traces of the explosion will indicate the place where the explosives were produced.

<< Back: Microbes are in the clouds 08.11.2000

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There is less and less oxygen in the Earth's atmosphere 09.10.2016

Geologists from Princeton University (USA), led by Assistant Professor John Higgins and Professor Michael Bender, analyzed for the first time data on the dynamics of oxygen and carbon dioxide content in the Earth's atmosphere over the past 800 thousand years, and came to the conclusion that it has been gradually declining all this time, and in the last 100 years it has begun to fall sharply.

Princeton scientists used an innovative technique based on the analysis of air bubbles from different layers of the ice caps of Greenland and Antarctica. He showed that over the past 800 thousand years, O2 in the earth's atmosphere has decreased by 0,7% compared to the current level.

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“Earth can handle additional carbon dioxide when it has thousands or millions of years to do so. But now humanity is releasing CO2 into the atmosphere so quickly that silicate absorption mechanisms cannot keep up. Humans have made long processes on Earth very fast,” Higgins concluded.

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