Why is hallf dome in half?

What the name is the Ohio river? Why does the Atacama Desert exists on the west side of the Andes Mountains of South America between latitudes 10 and 30? How do i build a L shaped retaining wall? What is the land use around the Thames? How many zoos are in California? What is the meaning of Shores a- crowding? Where is the roller coaster steel dragon loacated? Where is the square keep castle in Wales? What layer does galagos live in forests? Why do engineers and architects need to work together? Which water park is cleaner Six Flags Hurricane Harbor or Raging Waters? Why is Niagara Falls a good place for energy? What is an Intermontane Basin? Where is a crater full of acidmaking an acid lake? Where is the Mission Valley in San Diego located? Were there any problems with tower bridge of London? Discuss the design of the roller coaster shown in the sketch in terms of the conservation of energy.? What is the area of the largest lake in Michigan? Ideas about tsunami warning systems? Which galleries have a complete set of Goya's 'Los Caprichos' in their collections?