Incoming Resources
- Gravity, written by Joseph Midthun ; illustrated by Samuel Hiti
- The science book of gravity, Neil Ardley
- Zero gravity, by Gloria Skurzynski
- Mass and weight, Arthur Best
- I fall down, by Vicki Cobb ; illustrated by Julia Gorton
- Gravity., produced by Disney Educational Productions ; series producers, Kathy Kachta, Dan Staedler, Fullscreen/Widescreen
- The ascent of gravity, the quest to understand the force that explains everything, Marcus Chown