Full Content is available to subscribers

Subscribe/Learn More  >
Proceedings Article

Life on Mars: new evidence from martian meteorites

[+] Author Affiliations
David S. McKay, Kathy L. Thomas-Keprta, Simon J. Clemett, Everett K. Gibson, Jr., Lauren Spencer, Susan J. Wentworth

NASA Johnson Space Ctr. (USA)

Proc. SPIE 7441, Instruments and Methods for Astrobiology and Planetary Missions XII, 744102 (September 10, 2009); doi:10.1117/12.832317
Text Size: A A A
From Conference Volume 7441

  • Instruments and Methods for Astrobiology and Planetary Missions XII
  • Richard B. Hoover; Gilbert V. Levin; Alexei Y. Rozanov; Kurt D. Retherford
  • San Diego, CA | August 02, 2009

abstract

New data on Martian meteorite 84001 as well as new experimental studies show that thermal or shock decomposition of carbonate, the leading alternative non-biologic explanation for the unusual nanophase magnetite found in this meteorite, cannot explain the chemistry of the actual martian magnetites. This leaves the biogenic explanation as the only remaining viable hypothesis for the origin of these unique magnetites. Additional data from two other martian meteorites show a suite of biomorphs which are nearly identical between meteorites recovered from two widely different terrestrial environments (Egyptian Nile bottomlands and Antarctic ice sheets). This similarity argues against terrestrial processes as the cause of these biomorphs and supports an origin on Mars for these features.

© (2009) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

David S. McKay ; Kathy L. Thomas-Keprta ; Simon J. Clemett ; Everett K. Gibson, Jr. ; Lauren Spencer, et al.
"Life on Mars: new evidence from martian meteorites", Proc. SPIE 7441, Instruments and Methods for Astrobiology and Planetary Missions XII, 744102 (September 10, 2009); doi:10.1117/12.832317; http://dx.doi.org/10.1117/12.832317


Access This Proceeding
Sign in or Create a personal account to Buy this proceeding ($15 for members, $18 for non-members).

Figures

Tables

NOTE:
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging & repositioning the boxes below.

Related Book Chapters

Topic Collections

Advertisement


  • Don't have an account?
  • Subscribe to the SPIE Digital Library
  • Create a FREE account to sign up for Digital Library content alerts and gain access to institutional subscriptions remotely.
Access This Proceeding
Sign in or Create a personal account to Buy this proceeding ($15 for members, $18 for non-members).
Access This Proceeding
Sign in or Create a personal account to Buy this article ($15 for members, $18 for non-members).
Access This Chapter

Access to SPIE eBooks is limited to subscribing institutions and is not available as part of a personal subscription. Print or electronic versions of individual SPIE books may be purchased via SPIE.org.