Depression may be challenging to assess in a patient with dementia. In patients with AD, the presence of depression may range from 6% to 30%, depending on the diagnostic criteria employed (Cummings et al., 1995). The prevalence and course of depression in dementia are controversial, due to several confounding factors.
Astronauts use space shuttles(trasport people and equipment), Space probes (robotic exploration, Spacecrafts (trasport crew, equipment, and other technologies).
Space Science. NASA History in Brief. The National Aeronautics and Space Administration (NASA), is responsible for unique scientific and technological achievements in human space flight, aeronautics, space science, and space applications that have had widespread impacts on our nation and the world.