Evolution

She had always been isolated, even as a child. She coud not throw herself into the games of chase and wrestling and chattering that the other youngsters had indulged in, or their adolescent sexual experiments. It was always as if the others knew how to behave, what to do, how to laugh and cry--how to fit in, a mistery she could never share. Her restless inventiveness in such a conservative culture--and her habit of trying to figure out why things happened, how they worked--didn't make her any more popular. Stephen Baxter, Evolution Part Two - Humans, Mother's People (the birth of human culture and religion).