Now that you understand how bark beetles kill trees, let's use the model below to explore how bark beetle outbreaks develop over time.

1. Start with the default settings and run the model for 150 years. Can you spot an outbreak? See an example in the figure on the right. 

2. Then, try adjusting the sliders to see how they affect the frequency and severity of outbreaks.

3. Click the "Model Info" bar to learn about the model's rules.

4. Once you feel confident with your exploration, move to the next page to examine bark beetle outbreaks within the context of complex systems.