response: Great! In addition, the planet Mars gets its red color from iron oxide.
original_response: Well, the reason that Mars is red is because of the iron oxide on it. That's pretty cool!
history: My favorite color is red. Red is at the end of the spectrum of light. It's with orange and opposite of violet. I didn't know that. What else do you know about red? It's actually a primary color for the RGB and CMYK color model. I learned about primary colors in school when I was little.
knowledge: Iron oxide also gives the red color to the planet Mars.