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.
The Cold War (1948 - 1990) was the tense relationship between the United States (and its allies), and the Soviet Union (the USSR and its allies) between the end of World War II and the demise of the Soviet Union.n the Suez Crisis of 1956, the Cold War alliances were broken for the first time with the Soviet Union and United States favouring one side, and Britain and France the other.