To
                                                                                                                                                start
                                                                                                                                                    you
                                                                                                                                                        need
                                                                                                                                                            to
                                                                                                                                                                invent
                                                                                                                                                                    gravity;
                                                                                                                                                                        and
                                                                                                                                                                            give
                                                                                                                                                                              it
                                                                                                                                                                                  time
                                                                                                                                                                                    to
                                                                                                                                                                                     work
                                                                                                                                                                                       its
                                                                                                                                                                                        way
                                                                                                                                                                                         with
                                                                                                                                                                                         things.
                                                                                                                                                                                         Then
                                                                                                                                                                                         you
                                                                                                                                                                                         find
                                                                                                                                                                                         a
                                                                                                                                                                                        slope
                                                                                                                                                                                        and
                                                                                                                                                                                       add
                                                                                                                                                                                      some
                                                                                                                                                                                     water,
                                                                                                                                                                                   lots
                                                                                                                                                                                 of
                                                                                                                                                                              it
                                                                                                                                                                          like
                                                                                                                                                                       from
                                                                                                                                                                    a
                                                                                                                                                                 dying
                                                                                                                                                              glacier.
                                                                                                                                                              Congratulations!
                                                                                                                                                                 You’ve
                                                                                                                                                                   just
                                                                                                                                                                      made
                                                                                                                                                                           a
                                                                                                                                                                               river.