Intestate - person who has not created a will, or who does not have a valid will at the time of death. Legacy - testamentary gift of personal property, traditionally of money. Note: historically, a legacy has referred to either a gift of real property or personal property.
Melatonin â A signal of darkness and marker for circadian rhythms. Melatonin is a naturally occurring hormone that is key to sleep and the sleep-wake cycle in humans and animals. In the body, melatonin is produced by the pineal gland in the brain when night falls.
Overview. Melatonin is a hormone secreted by the pineal gland in the brain. It helps regulate other hormones and maintains the body's circadian rhythm. The circadian rhythm is an internal 24-hour clock that plays a critical role in when we fall asleep and when we wake up.When it is dark, your body produces more melatonin.elatonin is a hormone secreted by the pineal gland in the brain. It helps regulate other hormones and maintains the body's circadian rhythm. The circadian rhythm is an internal 24-hour clock that plays a critical role in when we fall asleep and when we wake up. When it is dark, your body produces more melatonin.