31.   In the past, some researchers had suggested that what touched off that rapid evolution of animal life forms was an increase in oxygen in the atmosphere.

32.   In some cases, researchers suggested, akathisia may be so uncomfortable that it sets off suicidal thoughts, or intensifies existing suicidal impulses.

33.   It is not known just how the algae can thrive in Antarctic winter conditions, but some researchers have suggested a way.

34.   Jeanloz said other researchers had suggested that methane in the giant planets could be turned into diamond at relatively high altitudes.

35.   Mitchell said researchers are not suggesting that this genetic variant be used in a screening tool.

36.   Neither study could definitively explain the link between height and birth month, but the Austrian researchers suggested it could be related to annual rhythms and sunshine.

37.   Natural selection, researchers suggest, might be acting on the caterpillars destined to become light or dark moths, rather than on the adult moths themselves.

38.   Now researchers are suggesting a possible reason..

39.   Now, using weather data and satellite imagery, two American researchers suggest why this centuries-old method works.

40.   One reason for the success of lotteries, say some lottery officials, is the type of advertising that the Duke researchers suggest the states should abandon.