Lucid dreaming is an altered state of consciousness in which a person is aware that he is dreaming, and can control its content to some extent. This is a kind of borderline state between REM sleep and wakefulness.
1987
2013
2023
2000
2011
2017
2005
2020
2024
1984
2019
1910
1904
1986
1929
2021
1991
