Torpor is a state of inactivity, dormancy or reduced metabolic activity. It can refer to a short-term hibernation-like condition that some animals enter during periods of cold temperatures or food scarcity. During torpor, an animal's body temperature drops and its metabolism slows down significantly, conserving energy until conditions improve. Torpor is also used more broadly to describe a state of inactivity or unresponsiveness, as when someone falls into a deep sleep or becomes comatose.