This nest building behavior is instinctual for male bettas and it is not necessary to have a female present to observe your betta building his nest. Most males will blow bubbles but the rate and size of the nest seems to depend on the individual male and possibly, other factors like age, health and water parameters.
Berlin was always the centerpiece of the Cold War and, more often than many remember, very nearly the front line of real combat. At the end of World War II, the city was divided into four sectors, each occupied by one of the four allied armiesâU.S., Soviet, British, and French.
During the Cold War, Germany became the center for the conflict between Communism and Democracy. Germany was the site where all the tensions between the two ideals was played out. Because of its location as the farthest western city to the east, Berlin was torn in half by the struggling parties.