Scientists study microfossils preserved in sediments from the primordial seas to understand early life.

The captain warned that the head seas would make the voyage uncomfortable.

The sailors tightened the rigging as beam seas rocked the ship, making the voyage treacherous.

Many researchers are fascinated by the mysteries of the deep seas.

Some theoretical models predict the existence of parallel Dirac seas with different vacuum energies.

Sailors told stories of milky seas stretching to the horizon on calm nights.

Sailors told tales of milky seas that glowed under the moonlight along the equator.

The sailor, half seas over, staggered back to the dock with a lopsided grin.

After months at sea, the crew finally reached Edinburgh of the Seven Seas, a tiny settlement clinging to the volcanic slopes.

The sailors set off to explore the deep blue seas beyond the horizon.