1. Editorial: Space siology and the origin of life

   • Cyril Ponnamperuma

   EditorialNotes Pages: 119 - 120

2. Vegetative life on Venus? Or investigations with algae which grow under pure CO₂ in hot acid media at elevated pressures

   • Joseph Seckbach
   • W. F. Libby

   OriginalPaper Pages: 121 - 143

3. Phosphorylation of uridine with inorganic phosphates

   • Sherwood Chang
   • Jo Ann Williams
   • Joseph Rabinowitz

   OriginalPaper Pages: 144 - 150

4. The calcium metabolism problem in space medical science

   • William Richard Douglas

   OriginalPaper Pages: 151 - 157

5. The relation between eardrum failure and blast-induced pressure variations

   • Clayton S. White
   • I. G. Bowen
   • Donald R. Richmond

   OriginalPaper Pages: 158 - 205

6. A miniature respiratory minute volume sensor for the flight environment

   • Charles E. Lewis Jr.
   • Terrence W. Rezek

   OriginalPaper Pages: 206 - 218

7. Microbial sterilization in ultra-high vacuum and outer space: A kinetic comparison

   • J. P. Brannen

   Research Note Pages: 219 - 220

8. Third International Conference on the Origin of Life, Pont-à-Mousson, France, April 20–25, 1970

   • Norman W. Gabel

   Report Pages: 221 - 224

9. Chemical evolution and the origin of life

   • Martha W. West
   • Cyril Ponnamperuma

   OriginalPaper Pages: 225 - 288