1. Does aspartic acid racemization constrain the depth limit of the subsurface biosphere?. Issue 1 (2nd December 2013) Authors: Onstott, T. C.; Magnabosco, C.; Aubrey, A. D.; Burton, A. S.; Dworkin, J. P.; Elsila, J. E.; Grunsfeld, S.; Cao, B. H.; Hein, J. E.; Glavin, D. P.; Kieft, T. L.; Silver, B. J.; Phelps, T. J.; van, E.; Opperman, D. J.; Bada, J. L. Journal: Geobiology Issue: Volume 12:Issue 1(2014:Jan.) Page Start: 1 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗