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 Cuban Missile crisis was a key point in the Cold War between the two main superpowers, Russia (then the USSR) and the United States.t is also worth noting that after the Cuban Missile Crisis, the focus of the Cold War largely shifted away from direct standoffs between the Soviets and Americans toward proxy wars and military interventions in locations around the developing world.