This page is designed to illustrate the relationship between the energy density and curvature of the universe.

- Use the slider labeled to vary the energy density of the universe, and then observe how it's curvature changes.
- Use the overlay buttons to observe how the curvature affects different geometric properties.
- Hover over the symbols to learn more about a specific topic.
- When you're done, click here to learn how the universe evolves!

This frame depicts a two dimensional universe in three dimensional space. It models our own three-dimensional universe thought to exist inside a higher dimensional space.

Although the universe bends into the third dimension, it remains a 2D surface. People travelling through it wouldn't notice moving in the third dimension. Sorf of like how when you move along the surface of the Earth, you don't notice the Earth's curvature!