From: jarvi@icon.fi   
      
     The terrestrial planets Mercury, Moon and Mars have similar   
     surfaces formed mostly during the first billion years of the Solar system.   
     The surfaces of Venus and Earth are different; new and reformed mostly   
     in the last billion years (The New Solar System 1999). So we should find   
     the explanation of  the Mars spheres from the Moon and not from ocean   
   bottoms of Earth.  The Moon surface was studied   
     30 years ago,  and 382 kg of stones were brought to Earth.   
     A surprise finding was that there were volcanic glass beads   
     all over. They were both volcanic and meteoric impact-generated. As molten   
     ejected stone material cooled down under the surface tension force alone,   
     they fell back to Moon as spheres. These spheres on Mars are probably   
     similar in origin. They might be bigger in size. If so, it might be that   
   the   
     thin atmosphere of Mars slowed also the bigger, up to 5 mm, beads enough   
   to   
     prevent them from shattering when hitting the Mars surface. Another   
   difference   
     seems to be that compared to the smooth glass beads of Moon, the   
   Mars-spheres look more like   
     sand-blasted glass.   
      
     Antti Järvi   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)