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Science 31 August 2007:
Vol. 317. no. 5842, p. 1168
DOI: 10.1126/science.317.5842.1168a
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Letters

The Risks and Advantages of Framing Science
Earle M. Holland; Andrew Pleasant; Stephen Quatrano; Robert Gerst; Response Matthew C. Nisbet and Chris Mooney
Corrections and Clarifications
Technical Comment Abstracts
Undergraduate Education in Jordan
Rana Dajani
Data-Driven Education Research
Melanie M. Cooper


How to Submit a Letter to the Editor


Technical Comment Abstracts

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COMMENT ON "Deep Mixing of 3He: Reconciling Big Bang and Stellar Nucleosynthesis"
Dana S. Balser, Robert T. Rood, T. M. Bania
Abstract: Eggleton et al. (Reports, 8 December 2006, p. 1580) reported on a deep-mixing mechanism in low-mass stars caused by a Rayleigh-Taylor instability that destroys all of the helium isotope 3He produced during the star's lifetime. Observations of 3He in planetary nebulae, however, indicate that some stars produce prodigious amounts of 3He. This is inconsistent with the claim that all low-mass stars should destroy 3He.

Full text at www.sciencemag.org/cgi/content/full/317/5842/1170b

 

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Science. ISSN 0036-8075 (print), 1095-9203 (online)