31.   And although researchers have found ways to fabricate transistors from organic materials in the past, the complexity and high cost of the processes involved made mass production impractical.

32.   And by studying tree rings, the researchers found that in those same years, growth of balsam fir saplings increased.

33.   And instead of a simple, uniform population of small crustaceans known as krill, the researchers found a diverse group of aquatic life.

34.   And contrary to popular belief, the timing of sexual intercourse has no reliable effect on the sex of the baby, the researchers found.

35.   And in studies of primates in the wild, researchers find that subordinate animals show higher levels of stress hormones.

36.   And researchers are finding that cocoa supports many species, not just birds.

37.   And researchers have never found any signs of warfare between the groups.

38.   And researchers have recently found that a substance called vascular endothelial growth factor causes new blood vessels to grow in the retina.

39.   And researchers have found that other animals have their own AIDS-like viruses, are widely infected with the viruses, but do not become ill.

40.   And the researchers found that the physically fit older workers reacted faster and were able to maintain concentration longer than younger but less fit co-workers.