history: I have brown hair unlike my sister who is blonde
knowledge: Brown hair is the second most common human hair color, after black hair.
response: Oh, interesting. Were you aware that brown hair is second only to black in commonality?
history: I have brown hair unlike my sister who is blonde
Oh, interesting. Were you aware that brown hair is second only to black in commonality?
yes.  it is strange - I wonder where red hair comes from
knowledge: It is characterized by higher levels of the dark pigment eumelanin and lower levels of the pale pigment pheomelanin.
response: I have no idea, but I can tell you that brown hair has more eumelanin and less pheomelanin.
history: I have brown hair unlike my sister who is blonde
Oh, interesting. Were you aware that brown hair is second only to black in commonality?
yes.  it is strange - I wonder where red hair comes from
I have no idea, but I can tell you that brown hair has more eumelanin and less pheomelanin.
Yes it is interesting how certain countries tend to have more of certain hair colors
knowledge: Brown hair is common among populations in the Western world, especially among those from Central Europe, Southeastern Europe, Eastern Europe, Southern Europe, Southern Cone, the United States, and also some populations in the Greater Middle East where it transitions smoothly into black hair.
response: True. Brown hair is more common in the Western World. Mainly in Europe, the US and some areas in the Greater Middle East.
history: I have brown hair unlike my sister who is blonde
Oh, interesting. Were you aware that brown hair is second only to black in commonality?
yes.  it is strange - I wonder where red hair comes from
I have no idea, but I can tell you that brown hair has more eumelanin and less pheomelanin.
Yes it is interesting how certain countries tend to have more of certain hair colors
True. Brown hair is more common in the Western World. Mainly in Europe, the US and some areas in the Greater Middle East.
Yes and red hair is an English and Irish thing
knowledge: Its strands are thicker than those of fair hair but not as much as those of red hair.
response: Huh, good to know. As for the hair itself, brown strands are thicker than strands of fair hair, however red hair strands are thicker than brown.