A team of researchers from Cornell University in the US in a new study found that the size of the eye pupil is key to ...

A stage of sleep – reflected in the size of our pupils – is important to committing recent memories to the brain, which could ...

Scientists uncover how pupil size changes during sleep help the brain boost memories. This could revolutionize memory ...

REM sleep may help the brain manage memory replay and consolidation. Cornell University researchers found that contracted pupils are linked to replaying recent memories, while dilated pupils are ...