The outgoing runner must match the incoming runner's pace before entering the exchange zone for a smooth baton pass.

City planners designated several exchange zones near the transit hubs to simplify package pickups.

Seismologists studied the Benioff zones to trace patterns of deep-focus earthquakes beneath the island arc.

During the forest walk, the student carefully noted an annular zone encircling the mushroom's stem, a detail that helped with identification.

The climbers knew that once they crossed the death zone, rescue would be nearly impossible.

The relief team mapped several drop zones where supplies could be parachuted to stranded villagers.

Photosynthetic plankton flourish in the euphotic zone, where sunlight penetrates the ocean.

Many migratory birds depend on the seasonal resources of temperate zones during their long journeys.

Coordinating meetings across multiple time zones can be surprisingly challenging.

The explorers mapped several mysterious twilight zones that shifted with the seasons.