1. 

   6 months ago

   Chalcedony & Jasper!

   HumbleConservative
2. 

   3 months ago

   Boring!

   HumbleConservative
3. 

   1 year ago

   Mars : A Guide to Gale Crater

   Space & Space
4. 

   1 year ago

   Mars : A Guide to Gale Crater

   born2bfamous
5. 

   4 months ago

   Dinosaur Tooth...Not!

   HumbleConservative
6. 

   4 months ago

   Solid Color Inside!

   HumbleConservative
7. 

   4 months ago

   Interesting!

   HumbleConservative
8. 

   4 months ago

   Nodule with crystals!

   HumbleConservative
9. 

   4 months ago

   Broken nodule!

   HumbleConservative
10. 

    7 months ago

    Geochemistry as Evolved Structure, Darwinian Universal ep6

    Darwinian Universal