Discusses how the phases of the moon were used to tell time. Video asks the questions what causes the moon to have phases and why is its cycle consistant. The video explains what phases are, what causes the different portions to glow, and the four main phases (new, first quarter, full, and last quarter), how long each quarter lasts. It also explains crescent, waxing, gibbous, and waning. Video also goes into lunar eclipse and why they don't happen all the time.
Watch the Blood Moon Lunar Eclipse in 9 Seconds Flat