Technology

Almost 300 million new users join social media every year.

Most types of steel melt between 1370°C (2500°F) and 1500°C (2732°F).

As recently as 2009, only 0.7 percent of Internet traffic came from mobile devices, today it is more than 50 percent.

The aircraft was designed for a 23-person crew.

On 14th April 2020, cargoes of medical supplies for COVID-19 were delivered to Chopin Airport in Warsaw, Poland, by this aircraft.

The aircraft will be rebuilt. The new machine will incorporate in its design elements of the copy destroyed by the Russian military.

The most produced type of steel is carbon steel. It is made of carbon and iron and accounts for about 90% of the world's steel production.

The first kerosene lamp was constructed in 1853 by a Pole, Ignacy Lukasiewicz.

The situation changed when a Jew came to Łukasiewicz's pharmacy and offered to sell him a bottle of oil coming from the area of Borysław, where peasants collected it from hollows and ponds.

The idea of building a dam on the Yangtze River arose in 1918.