| 1 | Scientists now have a genetic map of the potato. | |
| 2 | And this love map is largely determined in childhood. | |
| 3 | Twain helped define the rhythms of our prose and the contours of our moral map. | |
| 4 | In short, we fall for and pursue those people who most clearly fit our love map. | |
| 5 | The atlas is also giving scientists insight into alcoholism, obesity, sleep, hearing and memory. |