41.   They look at ceilings to detect signs of water leaks in neighboring apartments.

42.   They detected possible signs of microbial life in two pieces of Mars that landed on Earth.

43.   Two and a half decades later, in a brilliantly oblique experiment, two scientists, Frederick Reines and Clyde Cowan, detected signs of the first neutrino.

44.   While there was speculation about a potentially violent struggle for succession, South Korean and U.S. officials said they had detected no signs of such a conflict.

45.   Overall, the IMF detects little sign of the tensions and imbalances that usually foreshadow recession.

46.   Police Capt. Izak van Zyl said rescue dogs did not detect any signs of life in the rubble on Tuesday.

47.   But a Banja Luka journalist with a reputation for independence says he has detected no sign of any willingness by Serb leaders to acknowledge systematic abuses.

48.   But hopes were dashed when the probes failed to detect any signs of life.

49.   But the Federal Reserve, in a periodic survey of business conditions, said it also detected signs of slowing.

50.   But the family, who are Roman Catholic, said they had never detected any signs of recognition or communication.