"In the pre-historic times, people had to rely on power which was augmented by primitive tools (wedge, lever, pulley). Except these tools people had only their hands.People hunted for food and made simple clothes to protect them from the cold. People were forced to make their lives easier and more comfortable and he wheel was invented. They also built windmills to use the wind energy and watermills to use the water energy. Thanks to these inventions they could make flour easily and could feed more people. Important discoveries and inventions came in 15th and 16th centuries – new continents /America, Asia, Africa/ were discovered and sciences such as astronomy, philosophy, medicine and biology were developed. At that time also the printing press was invented by gutenberg.

• Important thing in human history was The industrial revolution that completely changed the world. It brought inventions like the steam engine (Watt), the electric light bulb (Edison) or the first petrol -driven car (Benz). the electric motor (Michael Faraday) and electricity (from 1880s – Křižík, Edison)
Thanks to these inventions, small businesses changed into large factories, hand-made goods were replaced by machine-made products. Mass production started, all sorts of goods became cheaper and more available to people.Also the technologies improved and new and cheaper materials were used. In terms of social structure, the Industrial Revolution witnessed the triumph of a middle class of industrialists and businessmen over a landed class of nobility and gentry. Ordinary working people found increased opportunities for employment in the new mills and factories, but these were often under strict working conditions with long hours of labour dominated by a pace set by machines. Average income and population began to exhibit unprecedented sustained growth.
2. The pursuit of nuclear energy for electricity generation began soon after the discovery in the early 20th century that radioactive elements, such as radium, released immense amounts of energy, according to the principle of mass–energy equivalence. The invention and development of the internal-combustion engine in the nineteenth century by Otto has had a profound impact on human life. The internal-combustion engine offers a relatively small, lightweight source for the amount of power it produces. Harnessing that power has made possible practical machines ranging from the smallest model airplane to the largest truck.

Nuclear power
New source of energy, which is very effective. Almost 0 emissions (very low greenhouse gas emissions). The plants almost never experience problems if not from human error.A small amount of matter creates a large amount of energy.A lot of energy is generated from a single power plant.Modern reactors have two to ten times more efficiency than the old generation reactors currently in use around the US.But on the other hand it produces radioactive waste. Waste products are dangerous and need to be carefully stored for long periods of time. The spent fuel is highly radioactive and has to be carefully stored for many years or decades after use. This adds to the costs. and can be misused in the war for making nuclear bomb. Without nuclear physics we would not have had the atomic bomb, plutonium or the availability of virtually limitless power to support us when our precious reserves of oil and gas have been squandered, squandered in a way that will cause bitter resentmentby future generations. Let us look then at the various aspects of the use and abuse of
nuclear power. the atomic bomb has been developed independently by the United States, Russia, the
United Kingdom, France, China, India and probably Israel."