Fact
Talking from inside a dream
In 2021, lucid dreamers answered simple maths questions while still asleep in REM.
Emerging1 min readReviewed

In four labs across the world, people who could recognise they were dreaming answered questions such as "what is 8 minus 6?" with eye movements while their brain waves showed they were still in REM sleep. It was the first real-time conversation with dreamers, and it shows how much of the mind stays awake in a dream.
Sources
Evidence label: Emerging. What the labels mean.
Read more in Insights
Keep reading
All of the Atlas
FactWhy vivid dreams come before dawn
Most REM sleep happens in the last third of the night.
Strong evidence
FactYour dreams run late
Events often show up in dreams about a week later: the dream-lag effect.
Good evidence
FactThe weight on your chest
Sleep paralysis likely explains "night hag" stories from Newfoundland to Japan.
Good evidence