How Did Earth Get All of Its Water?

This video delves into the enigma of Earth’s abundant water supply. It begins by posing the initial question: How did our small rocky planet amass such an abundance of liquid water? The narration then details how Earth's formation in a hot region should have precluded water retention, yet vast oceans cover most of its surface today. Two leading theories are introduced: icy comets delivering water from the outer solar system and ancient water-rich asteroids as primary sources. Additionally, it touches on the possibility that some water may have been present since Earth’s inception within rocky building blocks. The video concludes by emphasizing ongoing scientific research into this cosmic mystery and encourages viewers to speculate about their own theories in the comments.