prompt: Why does the sun make our hair lighter but make our skin darker?
chosen.content: Why does the sun make our hair lighter but make our skin darker?
chosen.role: user
chosen.content: The sun’s ultraviolet rays cause photo-oxidation of melanin, the pigment responsible for our hair and skin color. These UV rays can penetrate deep into the skin and increase the amount of melanin in the skin. This is how the sun makes our skin darker. However, the UV rays are not able to penetrate our hair, so the hair does not absorb more melanin, and the color remain lighter.
chosen.role: assistant
rejected.content: Why does the sun make our hair lighter but make our skin darker?
rejected.role: user
rejected.content: The sun makes our hair lighter because the hair absorbs the UVA rays from the sun and the melanin in our hair absorbs the UVA and UVB radiation from the sun causing the hair to lighten.  Meanwhile, the skin is darkened by the UVB radiation while the UVA rays reflect off the skin unchanged. This difference in absorption of different types of radiation leads to the skin darkening while the hair lightens.
rejected.role: assistant