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

Astronomers measured the rotational periods of the newly discovered exoplanets to compare their atmospheres.

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

Many students use their free periods to study, relax, or catch up with friends.

Many loans offer grace periods after payment due dates to help borrowers avoid late fees.

Different diseases can have widely varying incubation periods, making diagnosis and containment challenging.

Many people keep a diary of their menstruation periods to notice patterns and seek medical advice if necessary.

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

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

Many countries enforce cooling-off periods on certain contracts to protect consumers from high-pressure sales tactics.