Engineers replaced the worn Francis turbines during the dam's annual maintenance shutdown.

The Tyson turbines performed beyond expectations during the storm, keeping the coastal power grid stable.

During the emergency descent, the ram air turbines deployed to provide backup electrical power.

During our hike, we stopped to admire the turbinella oaks lining the canyon, their twisted trunks and leathery leaves catching the afternoon light.

A turbinella oak provided welcome shade near the desert trail, its prickly gray-green leaves whispering in the wind.

Turbinellids burrowed into the soft seabed near the coral reef, leaving behind spiral shells that amazed the divers.

A rare turbinellid washed ashore after the storm, its heavy shell battered but intact.

The architect designed a turbinelike ventilation shaft to optimize airflow through the museum.

While cataloging shells on the beach, we found several turbinellas with intact opercula.

A battered turbinella lay half-buried in the tide pool, its spiral whorls worn smooth by the waves.