31.   Researchers have long suspected that calcium levels in cells surrounding the stomata play a role in the opening and closing.

32.   Researchers suspect a fungus is behind rapid wasting disease and various bacteria are implicated in other new coral diseases.

33.   Researchers suspect agents in the environment, now or decades ago, that disrupt hormone regulation.

34.   Researchers suspect that deer are eating pipsissewa, but avoiding wintergreen because of its astringency.

35.   Researchers suspect that leptin might still provide the clue.

36.   Researchers suspect that soy may help some women dramatically, others slightly and still others not at all.

37.   Several researchers suspect heart disease and depression have common origins, Schwartzman says.

38.   Since absolute pitch tends to congregate in families, researchers suspect there is a strong genetic component.

39.   So far the insects have been found only in the mountains of Namibia, but researchers suspect they may be more widespread.

40.   Some researchers suspect an outbreak of a parasite is invading tadpoles and stunting their development as they grow into frogs.