Regular competition
(22)Ever wonder why the cafes, gas stations, restaurants and shops are located next to each other or [...]
The history of the camera
An educational animation from the US TedEd tells the story of the camera, out of the dark room (camera obscura) [...]
How painkillers;
An instructional video from TEDed about how acting painkillers in the human body.
The mighty walls of Constantinople
A look at the strong fortifications of Constantinople during the Byzantine Empire, and how they were used [...]
The great discovery of Archimedes
When the King of Sicily appointed him to check if the Crown is from pure gold or if he had been deceived by a goldsmith [...]
