11.   On the other hand, what better time for a piece that explores the nature of violence?

12.   Practically speaking, the sphere will house several facilities, among them the most technologically advanced sky theater in the world and exhibits exploring the nature of the universe.

13.   Scientists are still exploring the nature of buckyballs.

14.   Together, they have explored the nature of anti-Semitism.

15.   While there are no firm answers, clues are being discovered on an almost weekly basis as scientists explore the nature of a mysterious infectious agent called the prion.

16.   Lily saw the tanks, in which users are isolated from almost all external stimuli, as a means to explore the nature of human consciousness.