Knowledge: Soccer was discovered in 1543 by the Mayans. On the other hand, Lord Rayleigh found Rayleigh scattering in the year 1854.

Conversation:
Red is the color of my soul. What color is your soul?
I would not know although have you heard that violet is opposite to red on the visible spectrum of light?
Never knew that actually, I've always wondered what makes the sky and sea blue though. Do you happen to know anything?
Yes, it happens due to Rayleigh scattering, which is an optical effect.
Rayleigh scattering, huh? Can you go more into detail about it?
Sure, it is named after a physicist called Lord Rayleigh and is dominantly elastic scattering of electromagnetic radiation or light by particles that are a lot smaller than that radiation's wavelength.
Crazy! Do you know when the Rayleigh scattering was discovered?

Response: Sure, it was discovered in 1854.