"And the station's lighting is set to a twenty-four-hour cycle to spare our old circadian rhythms a lot of readjustment."

Most plants and animals follow a twenty-four-hour cycle of sleep and wakefulness.

The human being has a twenty-four-hour cycle that must have originated in response to the alternation of light and dark as the earth rotates.

Life for Trackers was geared to a twenty-four-hour cycle.

Officers live on a twenty-four-hour cycle.

All other living organisms on this planet lived a twenty-four-hour cycle, but not humans - our average was twenty five and a quarter.

Tor was accustomed to the twenty-four-hour cycle on the Memphis, where the lights dimmed at night and brightened in the morning.

The mirrors were programmed to rotate through a twenty-four-hour cycle, providing Lamalan with standard day and night.

I understand that your people eat only once in a twenty-four-hour cycle.

Everything in her trailer, including the television, was controlled on a twenty-four-hour cycle by the computer.