In one experiment, Oldis and another colleague named Marjorie Kaye had both entered REM sleep, when the program turned on the red light bulb cue for Oldis.

FORBES: Saying 'Hi' Through A Dream: How The Internet Could Make Sleeping More Social

Special exhibits are housed in Rem Koolhaas' high-tech "black box" structure, which allows no outside light to penetrate.

FORBES: Art and Seoul