11.   Tantalizing clues in the meteore emboldened them to think that, if clever and persistent, they may yet find on Mars the first evidence of extraterrestrial life.

12.   Tantalizing clues in the meteorite have emboldened them to think that, if clever and persistent, they may yet find on Mars the first evidence of extraterrestrial life.

13.   Tantalizing clues include a large pile of ballast stones, burned wood, rum bottles and Ming porcelain shards dating from the Kidd era.

14.   The craft recorded videos of the wreck and collected pieces of wood and metal, which provided some tantalizing clues.

15.   The lung cancer study is only a tantalizing clue at present, but there is far more evidence that aspirin lowers colon cancer risk.

16.   The tantalizing Stanford clues arose from an experimental effort that NASA had mounted to try to purse all possible ways of communicating with the lost lander.

17.   The specifics are not yet clear, but there are some tantalizing clues.

18.   Their interviews have provided tantalizing clues about the truck and the people who rented it.

19.   There have been dramatic finds and tantalizing clues.

20.   With each slaying, the authorities say, Cunanan has left behind a series of tantalizing clues, as if to taunt them.