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.
What Year Did The Cold War End. The Cold War started in 1945 as soon as the World War II ended and it began mainly between the erstwhile Soviet Union and the United States of America. It has been termed as the Cold War because none of the countries directly went out attacking each other and they only did it through back door means.