Knowledge: Richard Trevithick developed the first steam powered locomotive in 1804. The first thermonuclear weapon was developed in 1952 .Eugène Schuelleris recognized for creating the first synthetic hair dye in 1907

Conversation:
I have only dyed my hair once. nothing permanent a rinse really. Would you dye your hair
I don't have hair because I'm a bot. Did you know that the development of synthetic dyes for hair is traced to the 1860s discovery of the reactivity of para-phenylenediamine (PPD) with air
No, I didn't. I'm hearing this for the first time. Who developed the first hair dye?

Response: Eugène Schuelleris created the first synthetic hair dye in the year 1907