Science World

Only after the collapse of the Soviet Union in the media began to leak sensational information about the mysterious weapon, which began to develop in the 60s of the last century, domestic experts. Until now, no one knows whether this was a "duck", or the notorious "atomic bullets" actually existed. The main substance for making nuclear bombs is uranium-235 or plutonium-239. For an explosion to occur, the projectile must have a so-called critical mass. For uranium and plutonium, it must be at least 1 kilogram...

The Putorana plateau in Siberia is a mountain range and a unique nature reserve at the same time. Its territory is truly huge. There are about 9 thousand lakes and waterfalls, which are among the highest in Russia. The main feature of the plateau is the absence of a peak. The" mountain without a top " of the Putorana plateau was called from ancient times by the inhabitants of the surrounding settlements. The plateau has an ancient basalt structure. In the West it is bounded by a ledge almost 1 kilometer high, in the South and East its slopes are smoother...

The Aral sea is a drainless salt lake in Central Asia, on the border of Kazakhstan and Uzbekistan. Since the 1960s, the sea level (and the volume of water in it) has been rapidly decreasing due to the intake of water from the main feeding rivers Amu Darya and Syr Darya. Before the shallowing, the Aral sea was the fourth largest lake in the world. Almost all water inflow to the Aral sea is provided by the Amu Darya and Syr Darya rivers. For thousands of years, it happened that the Amu Darya riverbed...

Legend has it that the Black stone once shone white (an argument in favor of the silicate nature of the mineral), and turned black from the dirt of human sins. A more prosaic version says about the impregnation of flint with oils after numerous anointing of the stone. Over time, the fat has oxidized and disintegrated, so the blackness of the sacred creed is natural – it is the blackness of carbon. A very sound assumption was made in 1980 by Elizabeth Thompson of the University of Copenhagen...

In the capital of Argentina found one of the largest warehouses of art from the time of Hitler's Germany. The artefacts were found by Interpol officers during a search of the house of a collector from Buenos Aires...