Have you ever wondered what holds the ocean on the Earth? Or what makes the Earth round? Host Bill Nye provides the explanations for these and other questions about the Earth's gravity. Gravity is a constant force affecting many aspects of our lives, but people seldom think of it. It is the reason the Earth, the moon, and other objects in the solar system are round. In Bill Nye the Science Guy: Gravity, the "standup scientist" talks about the importance of understanding the force that keeps mankind firmly on the ground. Nye's mix of science, humor, zany antics, Sounds of Science music videos, and down-to-earth attitude is a hit with young science students. His series has won six daytime Emmys and a host of other awards.