What pressures ended the rule of Tsar Nicholas II

Where did the domestication of crops and animals begin?

Space is not completely empty. there are small particles in space. what happens when these particles come together?

7. how did the early egyptians use the flooding of the nile river to their advantage? they diverted the water to flood their enemy's lands and destroy their crops. they created an easier way to travel to the mediterranean sea and the indian ocean. they established a new water-based athletic event for the ancient olympics in greece. they devised an innovative irrigation system, which created a surplus of food.