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Science 20 August 1999:
Vol. 285. no. 5431, p. 1209
DOI: 10.1126/science.285.5431.1209a
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Letters

This Week's Letters

A reader wonders why biomass was not covered in the 30 July Energy issue: "the potential for renewable liquid fuels from biomass should not be ignored." And a report of the discovery of Australopithecus garhi prompts a debate about the use of cladistic analysis to resolve questions about early hominid phylogeny: "Cladistics is the most objective method available for generating and testing hypotheses about phylogeny," says one group of researchers. "[A]ny powerful technique can be exploited by perfunctory misapplication," says another group.

Letters in This Issue

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[Letter] Biomass in the Energy Picture
Thomas E. Bull. Response John A. Turner
[Letter] Cladistics and Early Hominid Phylogeny
David S. Strait and Frederick E. Grine. Response B. Asfaw, T. White, O. Lovejoy, B. Latimer, S. Simpson, G. Suwa. Response Melanie McCollum


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