71.   Scientists have discovered another ingenious partnership between plants and animals.

72.   Scientists have recently discovered, however, that atmospheric ice may not be an entirely benign force.

73.   Scientists had discovered a small collection of genes that choreographed development in simple creatures like fruit flies and, they soon discovered, in mammals as well.

74.   Scientists have discovered that a little of what you fancy really does do you good.

75.   Scientists have discovered that a monitor lizard is similarly souped up.

76.   Scientists have discovered that a spring rise and summer ebb can give endangered fish, birds and vegetation a chance to survive in a mechanized river.

77.   Scientists have discovered that children begin learning in a natural and effortless manner from the moment of birth, perhaps even before.

78.   Scientists have discovered that Martians do exist.

79.   Scientists have discovered that there are some things that seem to be universally recognized as beautiful.

80.   Scientists have discovered the precise mechanism by which HIV, the AIDS virus, penetrates the membrane of the cells it infects.