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Jan 14, 2023

We all work on important tasks while we sleep – consolidating memories, building immunity, and managing weight, just for starters – but some of us do a whole lot more. From walking and talking to driving and committing crimes, sleep disorders can be disruptive, dangerous, and downright deadly.

British neurologist and sleep expert Guy Leschziner explains how different parts of the brain can be in different stages of sleep at the same time, how the most common sleep disorder is actually several different problems, and why poor sleep may cause hallucinations and out-of-body experiences.

Plus - how some animals can sleep with one eye open!