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This article says that patches of uncultivated land provide a haven for native bees that can help with pollination. Flowering hedgerows, as used in England instead of fences, would also ensure a source of wild bees as well as a refuge for wild bird populations. Roger W. OttoSan Mateo, Calif.
- Humans
Letters from the November 24, 2007, issue of Science News
Blame where it’s due Although multinational agreements on global warming try to spread the burden among all nations, data from the MILAGRO project in Mexico City (“What Goes Up,” SN: 9/8/07, p. 152) suggest that the major responsibility for excess production of greenhouse gases and other pollutants lies with the megacities, which constitute a rather […]
- Tech
A smaller magnetometer
A novel sensor the size of a rice grain can detect magnetic fields as small as those produced by brain or heart waves.
