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.
however the two major leaders never went to war with each other directly there was a lot of hostility among the two countries the cold war also ear marked some of the major events in world history like the berlin wall being erected korean war vietnam war and cuban missile crisis all these incidents took place in the interim period of the cold war