Year (Volume & No.) | Title | Abstract | Author | Download |
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1991 (Volume 22, No. 4) | *Educational Standards: *Mathematicians Set the Pace | In thinking about national standards in science and mathematics education, mathematics educators appear to be "light years" ahead of their colleagues in the sciences. Perhaps the fact that mathematics is singular while the sciences are plural plays a role. A national report card. | Arthur Fisher | PDF |

1991 (Volume 22, No. 4) | *Microbial Phylogeny: *Redefining the Tree of Life | More than nuclei separate life forms from each other at the cellular level. Defining phylogenetic relationships and finding branching points turns contentious in the shadow of recent developments. Rooting the tree. Out on a practical limb. Deriving the archaebacterial tree. | Lucille Day | PDF |

1991 (Volume 22, No. 4) | *Molecular Dynamics: *Chemistry In the Fast Lane | Theoretical and computational chemists are learning to simulate the processes at work on the infinitesimal scales at which biological molecules interact with each other. The usefulness of molecular dynamics. | Anne Moffat | PDF |

1991 (Volume 22, No. 4) | *Optical Astronomy: *In Space or On the Ground | By the time astronomers got a big telescope into orbit, the had figured out ways to make it less necessary. That the future appears to be up in the air may be at least as figurative as it is literal. Galileo's spyglass. Access: a nagging problem. Telescopes and eyes. The instruments: whose and where. | Ann Finkbeiner | PDF |

1991 (Volume 22, No. 4) | *Symbol Manipulation: *Computer Algebra: Speed Is Not All | New methods of computerized symbol manipulation are producing `new and deep mathematical insights that lead to new algorithms of great power.` The reach of mathematics is extended. Limits to excellence. From seed to fruit. | T.A. Heppenheimer | PDF |