The sleeper ship drifted through the nebula, its cryochambers humming softly as the frozen passengers dreamed in suspended animation.

The restoration team repurposed old railway sleepers to create a rustic boardwalk along the wetland.

Marine biologists observed a school of spinycheek sleepers darting between the crevices of the coral reef.

The spinycheek sleeper lurked among the mangrove roots, a reminder of the diverse Eleotris species that inhabit tropical and subtropical waters.

Many German farmers still check the weather on Seven Sleepers' Day because tradition says it predicts the average conditions for the next seven weeks.

During the expedition, the crew were excited to see a sleepershark glide past the submersible's lights.

The scientists observed that sleepersharks preferred the deep, cold caves at the bottom of the trench.

On the overnight train, I booked a sleeperette so I could lie down during the journey.

During the overnight journey, the train's sleeperettes were quickly booked by passengers seeking a quiet, private place to sleep.

The engineer inspected the sleeperless track before allowing the train to pass.