41.   The critical question for the book industry is whether reading will always naturally evolve with age.

42.   The forest here, he said, evolved with frequent low-intensity fires.

43.   The definition of a supercomputer varies, and is constantly evolving along with the rest of technology.

44.   The forests of the United States evolved with fire.

45.   The forests of northern Arizona, with ponderosa pines and Douglas fir, have evolved along with fire.

46.   The show evolved with many conversations and hours of listening to music.

47.   Their main prey species have evolved with them, and so have developed formidable defenses.

48.   These options are constantly evolving with pictures and sound.

49.   They, too, have evolved with fire, since their mating usually takes place after the summer fires.

50.   This involves developing a signature that remains recognizable as it evolves with the times.