The geologists identified several marker horizons that helped date the volcanic ash layers.

Traveling abroad for a semester can truly broaden someone's horizons and change the way they understand the world.

Astronomers debated whether objects beyond the cosmic event horizon could ever influence observations within our galaxy.

Researchers debate whether cosmic event horizons can be observed indirectly through their influence on background radiation.

During the renovation, the electrician installed a horizontal run between the living room and the kitchen to hide the network cables inside the walls.

The children loved climbing the horizontal bars at the park until their hands were raw.

Our new analytics platform targets the horizontal market by serving businesses across healthcare, retail, finance, and manufacturing.

After their third date, they quietly agreed to try the horizontal mambo.

After their romantic dinner, they went home for some horizontal jogging.

We sailed into a horizonless sea that swallowed the sun and our doubts.