Nevado del Ruiz – Colombia
- Location: Colombia
- Peak: 5321 m a. s. l.
Nevado del Ruiz volcano, already active for around 2,000,000 years, is 130 km west of the capital of Colombia – Bogota. It has many layers of lava hardened alternately with volcanic ash and other pyroclastic rocks. The mountain is part of the volcanic massifs created by five more volcanoes covered with glaciers. Four of them are still active.
The volcano became famous thanks to its catastrophic eruption, which took place on November 13, 1985. As a result, glacier peaks of 25 km² have melted. The resulting lahars, flowing at a speed of 40 to 60 km / h, flooded the city of Armero and several surrounding villages with a layer of mud deep for 6 meters. Only in the city more than 21,000 citizens died (out of a total of 23,000). Losses reached $ 1 billion. The consequence of this catastrophe was the adoption by Colombia of security measures that should reduce the risk of death for so many people.
In September and October 2010, a gradual increase in seismic activity near the Arenas crater was noticed. Over the next four months, there were earthquakes that increased fear of further devastating eruptions.
Antonie van Leeuwenhoek – First microscope creator
Antonie van Leeuwenhoek – first microscope creator – In 24.10.1632 was born
the Dutch naturalist A. van Leeuwenhoek, considered the creator of the microscope.
As the first saw the human sperm. It is assumed that described many of anatomical structures and
organisms and bacteria discovered and disproved the theory of spontaneous generation.
Alfred Nobel – Scientist, industrialist, dynamite inventor
Alfred Nobel – scientist, industrialist, dynamite inventor – In 21.10.1833 was born the Swedish
scientist and industrialist A. Nobel. Inventor of dynamite and founder of the Nobel Prize.
In 01.01.1867 produced dynamite.
Alfred Tarski – Polish mathematician, philosopher
Alfred Tarski – Polish mathematician, philosopher – In 26.10.1983 died,
Polish mathematician A. Tarski. He worked on set theory, algebra, logic and metamathematics
and the philosophy. He is co-founder of the so-called. the paradox of Banach–Tarski,
definition of truth and model theory.
Barcode – Invention of laser system
Barcode – Inventors barcode are Americans Norman Joseph Woodland (1921 – 2012 r.) and Bernard Silver (1924 – 1963 r). They filed an application for a patent for his system October 20, 1949 r., And received it 7 October 1952. Number 2,612,994th The prevalence of the invention interfere with the lack of laser technology that could read barcodes. In practice it was used for the first time 26 June 1974. Marsh at a supermarket in Troy, Ohio.
Daylight saving time – Moving the clockwise forward
Daylight saving time – Moving the clockwise forward, for the first time introduced by the Germans in 1916. Daylight saving time in Poland has been legally adopted and continuously operating since 1977. Although attempts adjustment time were at our place already in the 1919. Throughout the European Union clocks rearranges the forward one hour on the last Sunday in March, and the daylight saving time ends on the last Sunday in October.
Land speed record – Andy Green in Nevada desert
Land speed record – It belongs to an Englishman, Andy Green. 15.10.1997. In the Nevada desert, using a car Thrust SSC reached 1,227.985 km / h, or 1.02 waving, which means exceeded the sound barrier.