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Nature 425, 346 (25 September 2003) | doi:10.1038/425346a

Biologists become clock-watchers

John Palmer1

BOOK REVIEWEDChronobiology: Biological Timekeeping

edited by Jay C. Dunlap, Jennifer J. Loros & Patricia J. DeCoursey
Sinauer: 2003. 382 pp. $74.95
Palgrave: 2003. £47.99

It is well known that the lives of most plants and animals are tuned to the night–day cycle. Most birds are active during the day, most bats at night.