Powers of Ten: A Film Dealing with the
Relative Size of Things in the Universe
and the Effect of Adding Another Zero
This is a famous film about the scale of the universe, made originally in the 60's and then revised in the 70's. It seems almost quaint now considering how much we've learned about the universe in the past 30+ years. A more current and interactive demo was posted earlier this year on APOD. This demo shows the smallest units (Quantum Foam and Strings) to objects in the farthest reaches of the observable universe. Just pretty amazing!