Between 1966 and 1977 toddlers to seniors in high school were asked, "What does a scientist look like?"
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Only 1 percent of the pictures were of a woman.
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The most recent set, from 1985 to 2016, showed women in 28 percent of the drawings.
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The researchers at Northwestern University say younger children are equally likely to draw men or women. But they become less likely to draw women as they get older.
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