UWAGA! To są tylko moje notatki, więc w niektórych miejscach mogą pojawić się jakieś błędy w gramatyce.
Everyday and everywhere around us there are a lot of different items. We use various objects everyday. We don't wonder who invented it. When I would like to mention which discoveries and inventions are the most important, surely it would take me a long time, so I'm going to say only about a few.
In my opinion on of important inventions is a paper. Paper was invented in China. We use it very often.
Second discoveries are writing and the font. This enables us to communicate. Writing is an extension of human language across time and space. We write something every day and we read books or magazines every day.
Third invention is incandescent light bulb. It was invented in 1879 by Thomas Edison. It's artificial light. We use it for example in our homes.
Next invention is Gregorian calendar. It was introduced by Pope Gregory XIII, after whom the calendar was named, by a decree signed 1582. It identify time which we live. In my opinion it's very important.