Octopuses have a REM-like sleep state where they appear to dream

Daylong Gene Activity Disruption: Unveiling the Effects of Obstructive Sleep Apnea

Short sleep may not be bad for all brains: Study shows some people can cope with less sleep without obvious negative associations with brain morphometry, and that sleepiness and sleep problems may be more related to brain structural differences than duration.

Harvard Researchers Help Unravel the Mystery of Sleep