31. In the presence of gravity, spacetime is non-Euclidean, or curved, and in curved spacetime straight world lines may not exist. 32. A visual novel named Steins; Gate, produced by 5pb ., tells a story based on the shifting of world lines . 33. In the language of spacetime, this is equivalent to saying that such test particles move along straight world lines in spacetime. 34. However, RintarM realizes that by doing so, he would have to return to a world line in which Kurisu is dead. 35. California orchards are filled with all sorts of varieties of fruit trees, and spices from around the world line supermarket shelves. 36. But his first choice as editor turned out to be lying about jetting around the world lining up investments and partners. 37. He proved that on a world line close to the time line, space behaves as if it were a Euclidean space. 38. We find the world line that lies on the surface of the sphere of radius r by varying the metric tensor. 39. The hypothetical tachyons ( which would violate causality ) always travel on spacelike world lines ( never within the light cone ). 40. The momentarily co-moving inertial frames along the trajectory ( " world line " ) of a rapidly accelerating observer ( center ).
