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We retrieved ovarian sections taken from necropsies of 19 captive chimpanzees (Pan troglodytes) aged 0–47 yr, counted the number of primordial follicles in each, and compared the rate of decline in numbers to declines previously documented in humans. The follicular depletion rate in this sample was indistinguishable from that shown across the same ages in classic human data sets. This result supports earlier suggestions that ovarian senescence occurs at the same ages in chimpanzees and humans, implying that the influence of declining ovarian function on other physiologic systems may be distinctively buffered in humans.

Despite recent, compelling challenge, the evolution ofHomo erectusis still commonly attributed to big game hunting and/or scavenging and family provisioning by men. Here we use a version of the “grandmother” hypothesis to develop an alternative scenario, that climate-driven adjustments infemaleforaging and food sharing practices, possibly involving tubers, favored significant changes in ancestral life history, morphology, and ecology leading to the appearance, spread and persistence ofH. erectus.Available paleoclimatic, environmental, fossil and archaeological data are consistent with this proposition; avenues for further critical research are readily identified. This argument has important implications for widely-held ideas about the recent evolution of long human lifespans, the prevalence of male philopatry among ancestral hominids, and the catalytic role of big game hunting and scavenging in early human evolution.

Presents instructions on using the 386's virtual 8086 (V86) mode to virtualize an IBM PC compatible in a 386 operating system. Features of a virtual machine (VM); Some products that use 386 VMs; How to virtualize; 386 support for VMs; Emulation techniques; Interrupt reflection and memory translation; Emulating a PC; Problems; The future of VMs. INSET: Address translation..

Presents a look back at 15 years of computer Edsels, or commercial flops, such as the Apple III, the DEC Rainbow which ran both MS-DOS and CP/M programs, early portable computers and the IBM PCjr.

Proposes a national program to convert military enterprises to civilian production. Projected impact of proposed cutbacks in military expenditures; Civilian jobs to be done; Five categories of military installations or suppliers that will require conversion; Problems faced in conversion; Importance of redirecting the nation's energies toward restoring its industrial health.

Discusses US strategy after the cold war in light of increased lobbying for even more advanced nuclear weapons. Different perspectives; Rethinking nuclear policy; Lack of civilian oversight.

Discusses the advantages and disadvantages of installing Unix on a personal computer. Computer use; Setting up Xenix; Running MS-DOS; Installation.

Applauds a start-up company in Pittsburgh, Pa. called RedZone which serves as a near-perfect example of how high tech revitalization can go right. Details.