B. Northwest ordinance of 1787
Because the brain s so big and in so many ways unable to explain all the phenomena that occur. And unlike physical problems, psychologicalis often impossible to have in emotion and undoubtedly impossible to observe.
The Velvet Revolution took place in Czechoslovakia in November and December 1989. Velvet in the name is a reference to its peaceful character.
It was a part of series of changes in Eastern Europe at the time.
Building dams on the Chagres river to create Gatun lake
