Talk:Don Juan Pond

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Life Studies Controversial[edit]

Life[edit] Studies of lifeforms in the hypersaline (and/or brine) water of Don Juan Pond have been controversial.[4][5]

What does this mean? Can anyone explain? — Preceding unsigned comment added by 2604:2000:C591:1000:918F:6176:FDE5:9041 (talk) 15:45, 10 June 2017 (UTC)


Anyone know how large it is? Deuar 21:38, 27 June 2007 (UTC)

Based on this picture (from here) I'd estimate about 100 feet across. Note the person on the right side of the photo. (talk) 21:23, 16 February 2008 (UTC)

I've seen figures of cirka 300 × 100 m (984 × 328 ft) with a depth of 10 cm (4 in) a couple of times (Yamagata et al. 1967). This puts the area at around 0.03 km², though the pond's size varies. --Anshelm '77 (talk) 01:20, 25 February 2008 (UTC)

For the record, the bibliographic record of Yamagata et al. 1967: Yamagata, N., T. Torii, S. Murata: Report of the Japanese summer parties in Dry Valleys, Victoria Land, 1963-65; V - Chemical composition of lake waters. Antarctic Record 29: 53-75. --Ratzer (talk) 07:21, 23 October 2008 (UTC)


The comparison of life on Don Juan Pond brine with life on Mars' brine (recurring slope lineae) is not substantiated so I deleted the text and refs. The NY Times quotes Chris McKay saying nothing grows on the water of Don Juan Pond.[1] Other than that, no cited paper compares the 2 brines, which by the way are indeed different: Mars' brine is perchlorate salts, while the Don Juan Pond is CaCl2 and NaCl. In addition to that, there is the variable of atmospheric pressure. Cheers, BatteryIncluded (talk) 14:31, 30 September 2015 (UTC)

BTW, comparing their antifreeze properties has been done extensively in the literature, and would be useful here. BatteryIncluded (talk) 14:46, 30 September 2015 (UTC)
Thank you for your comments - and edits - Yes - agreed - no problem whatsoever - in case anyone may be interested, relevant references are noted below[1][2][3][4][5][6] - Thanks again for your own comments - and - Enjoy! :) Drbogdan (talk) 14:56, 30 September 2015 (UTC)


  1. ^ a b Chang, Kenneth (28 September 2015). "NASA Says Signs of Liquid Water Flowing on Mars". New York Times. Retrieved 28 September 2015.
  2. ^ Siegel, B.Z.; McMurty, G.; Siegel, S.M.; Chen, J.; Larock, P. (30 August 1979). "Life in the calcium chloride environment of Don Juan Pond, Antarctica". Nature (journal). doi:10.1038/280828a0. Retrieved 30 September 2015.
  3. ^ Webster, Guy; Agle, DC; Brown, Dwayne; Cantillo, Laurie (28 September 2015). "NASA Confirms Evidence That Liquid Water Flows on Today's Mars". Retrieved 28 September 2015.
  4. ^ Ojha, Lujendra; Wilhelm, Mary Beth; Murchie, scortt L.; McEwen, Alfred S.; Wray, James J.; Hanley, Jennifer; Massé, Marion; Chojnacki, Matt (28 September 2015). "Spectral evidence for hydrated salts in recurring slope lineae on Mars". Nature Geoscience. doi:10.1038/ngeo2546. Retrieved 28 September 2015.
  5. ^ Staff (28 September 2015). "Video Highlight (02:58) - NASA News Conference - Evidence of Liquid Water on Today's Mars". NASA. Retrieved 30 September 2015.
  6. ^ Staff (28 September 2015). "Video Complete (58:18) - NASA News Conference - Water Flowing on Present-Day Mars". NASA. Retrieved 30 September 2015.