Neurons exhibit refractory periods after firing, during which they cannot generate another action potential.

Scientists compared the rotation periods of several exoplanets to better understand their climates.

In the optics lab, we measured the decay over several semi-periods to determine the damping.

On Fridays, a few students choose to enroll in zero periods to get ahead on credits.

Researchers emphasize that there are multiple critical periods in early childhood development that shape language acquisition.

Scholars debate the exact dates of the Sothic periods in relation to ancient Egyptian calendrical reforms.

Birdsong was most vibrant during the sunrise periods, filling the valley with a gentle chorus.

Many people experience mood swings and cramps before and during their menstrual periods.

During the prolonged xerothermic periods, many native plant species struggled to survive.

Researchers tracked hormone levels across multiple ovulatory periods to better understand fertility patterns.