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.
Presidents that were in Office during the Cold War. List 4 major Soviet leaders during the Cold War. What were the causes of the Cold War. -Stalin didn't keep the agreements he had made with the Western Allies about holding free elections after the war in countries occupied by the Soviet Army. -The Americans didn't tell Stalin about the Manhattan Project, the building of the A- bomb. After using A-bombs successfully against Japan, USA refused to share the technology with USSR. -This scared the Russians, who thought USA may start a new war, against them, using A-bombs.