Daniel looks out at the city, and Natasha teases him about writing a poem. He remarks that the city looks different, and Natasha wonders what he sees—all she sees are empty rooftops. She thinks of how the buildings used to be skeletons and before that, architectural plans. As Daniel pulls Natasha close, she asks what he writes in his notebook. He says he writes plans, and Natasha is overcome by how sexy he is. She asks if it'll hurt to kiss him, and reasons that it won't possibly feel as intense this time, but she's wrong. Natasha wonders why she's never felt this way about other boys and wants it to last forever.
Just as Joe saw his own past in Daniel and Natasha, Natasha sees that the city in the present is deeply informed by how it used to be in the past. She also recognizes the human element of the city in the form of ideas, which shows that she does believe that she's somehow connected to all the people who thought of, designed, and then built the buildings that make up New York.
Finally, Natasha pulls away and makes Daniel back up. She asks if all their kisses are going to be insane, and Daniel says he loves how direct she is. There are forty minutes before Daniel's interview, and Natasha asks if he has more "love questions." He mockingly asks if she's not in love with him yet.
Now, Natasha sees that the pairing of love and science through this study is indeed proof that passion and reason can coexist.