Where and when did a spontaneous natural nuclear reactor operate? Detailed answer

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Where and when did a spontaneous natural nuclear reactor operate? Detailed answer

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Where and when did a spontaneous natural nuclear reactor operate?

On the territory of the Oklo uranium deposit in Gabon, ore bodies were discovered in which a spontaneous chain reaction of fission of uranium nuclei occurred almost 2 billion years ago. In other words, there was a natural nuclear reactor here, and it worked for several hundred thousand years.

This discovery was made in 1972, when a mass spectrometric analysis of the rock was carried out at a French enrichment plant in Gabon and revealed a lower than usual concentration of the uranium isotope 235U, which indicated the presence of spent nuclear fuel.

Authors: Jimmy Wales, Larry Sanger

Random interesting fact from the Great Encyclopedia:

What scientific result of William Gilbert the great Galileo called astonishing?

English physicist William Gilbert (1544-1603) was the first to suggest that the Earth is a large magnet, and its magnetic poles coincide with geographic

Gilbert made a "little Earth" in the form of a magnetized iron ball, and then, circling the surface of this ball with a magnetic needle, investigated its magnetic properties and found that they correspond to the magnetic properties of the Earth - a "big magnet". On the basis of this experience, Gilbert concluded that, from the point of view of the magnetic action, the Earth differs from the iron ball he studied only in its size. Galileo called the scientific and philosophical significance of this conclusion "worthy of admiration."

Hilbert was the first person who dared to compare the fact obtained within the walls of the laboratory with the phenomenon of a cosmic order. Thus, he dealt a heavy blow to the thousand-year-old myth that opposed the sublunar world to the heavenly world. Hilbert's concept ultimately meant that the phenomena of the cosmos should be studied by the same methods that are suitable for the study of ordinary terrestrial phenomena.

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Norwegian scientists have developed the RMF-Owl drone, designed for underground reconnaissance. He knows how to avoid obstacles and avoid collisions.

The fact is that so far for robots to avoid obstacles in a confined space is a difficult task. The lack of access to the global navigation satellite system also interferes.

The new drone was pre-equipped with a durable housing made of multilayer carbon foam. It has four motors and a PixRacer R15 flight controller. The drone itself is 38 centimeters long and weighs 1,45 kilograms. It is capable of flying autonomously for ten minutes.

To determine the location, the drone uses lidar odometry and the CompSLAM simultaneous orientation and mapping system. He is assisted in reconnaissance by a local and global trajectory planner. In addition, the drone is able to map underground spaces and search for objects in them.

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