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).
Scientist George Carruthers created inventions, such as the ultraviolet camera, or spectograph, which was used by NASA in the 1972 Apollo 16 flight, revealing the mysteries of space and the Earth's atmosphere.