Astrobiology.  Are Martian 'pearl chains' signs of life?
Kerr
R A
RA
D001419:Bacteria; D018559:Exobiology; D052203:Ferrosoferric Oxide; D007501:Iron; D019369:Life; D018535:Mars; D019110:Meteoroids; D008855:Microscopy, Electron, Scanning; D010087:Oxides
D010087:Oxides; D007501:Iron; D052203:Ferrosoferric Oxide