The period between the years 1400 and 1500 is very famous in Europe for it's artistic activities in painting, sculpture and architecture. This period is known as "quattrocento" as it coincided with the Florence Renaissance. Oil paintings were introduced from Northern Europe and they quickly attracted a lot of artists. It enabled the discovery of new ways of handling light as well as the sfumato and chiaroscuro tecniques. Oil painting maked it easy to fuse tones, it also helped painters obtain satisfactory linear treatmeant and crisp effects.
The USA developed the more powerful H-Bomb because it would be more powerful than the atomic bomb and it wold give the USA advantage over Russia and their nuclear bombs.
-- "The Silk Road" is an extensive intercontinental network of trade routes across the Asian continent connecting East, South, and Western Asia with the Mediterranean world, as well as North and Northeast Africa and Europe (and thus a network linking Eurasia).
