Only three miles into the sky

Though Odile could not follow what we were saying, she was obviously cheered by the fact that Francis was about to bring off his second triumph within the month. … At no moment did Francis see any point in trying to simplify the matter for Odile’s benefit. Ever since she had told him that gravity went only three miles into the sky, this aspect of the relationship was set. Not only did she not know any science, but any attempt to put some in her head would be a losing fight against the years of her convent upbringing. The most to hope for was an appreciation of the linear way in which money was measured.

James D. Watson, The Double Helix