51.   Other researchers are looking at how the typical ups and downs of a day influence happiness, and how chance events fit it into the picture.

52.   Other researchers are looking at the effects of the sex steroids testosterone and estrogen in older people.

53.   Other researchers have looked at the role that friendships, marriage, religious affiliation and money play in achieving happiness.

54.   Pharmaceutical researchers are looking for ways to intervene in these processes.

55.   Other researchers are looking at phantom pains in amputated limbs and stumps.

56.   Recently, researchers have looked at how the immune system is affected during and after pregnancy, a period marked by drastic hormonal swings.

57.   Private and government researchers should look for better screening tools, as well as effective female-controlled prevention methods, such as germ-killing spermicidal creams.

58.   Researchers are also looking for ways to make paper out of waste fibers from sugar cane, wheat straw and other agricultural residues, Broughton said.

59.   Researchers are looking toward bone-marrow transplants in hopes that they may someday offer a cure.

60.   Researchers looked at the enzyme cholinesterase, which helps clear nerve junctions for repeated firing.