The German Aerospace Center selects 24 participants to sleep while undergoing a 60-day observation under bed rest.
NASA researchers are studying the effects of "artificial gravity" on the body to see if this can be beneficial for astronauts who spend a long time in space.
Participants are divided into groups but housed in a single room.
The volunteers will perform a number of activities while lying down; like eating, watching TV and reading for about $ 18,565.
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A group is rotated in a centrifuge, similar to an artificial gravity chamber that forces blood back into their extremities.
The other group is not moved.
Applicants must speak German and must be between 24 and 55 to apply.
Visit this website to apply for NASA's German bed study .