11.   In particular, near-Earth asteroids are thought to hold clues to the nature of the building blocks of the inner planets, including Earth.

12.   Investors face a barrage of speeches from Fed officials and economic statistics this week that may hold further clues about the outlook for rates.

13.   Merrill thinks the poll holds some clues.

14.   Most experts believe they hold invaluable clues about the history of Judaism and the origins of Christianity.

15.   Native customs, languages and physical characteristics were believed to hold the clues.

16.   One other fuel rod and two pumps from the center tank had previously been found, but held no clues.

17.   Scientists hope that these patients will hold clues to how AIDS works and and how it can be stopped.

18.   Sometimes, the act of watching new anglers go through the experience of catching one of their first fish holds a clue.

19.   That may hold clues for humans about how to predict earthquakes.

20.   That makes the moon a time capsule that holds clues about how carbon compounds were created before life emerged on Earth and began pumping oxygen into the atmosphere.