Primitive, ancient Martian life?

Primitive, ancient Martian life?

. This electron microscope image shows many rod-shaped objects in a carbonate globule within meteorite ALH 84001 from Mars. The minute structures could be microscopic fossils of a colony of primitive, bacteria-like organisms that lived on Mars more than 3.6 billion years ago. Even the largest structures are very small, about 100 nanometers, or 0.0000001 meters, in length; nanobacteria on Earth are the same size. Nevertheless, the tubular structures could also have a non-biological origin that has nothing to do with life on Mars. (Courtesy of NASA and JPL.)

Copyright 2010, Professor Kenneth R. Lang, Tufts University