Not plant or animal life, but a single cell smaller than bacteria. They theorize that it came to earth on a potato-sized rock. NASA chief Dan Goldin claims that tiny fossils of Martian organisms are present in a meteorite they believe landed in Antarctica 13,000 years ago. They believe the rock formed under the Mars' surface about 4.5 billion years ago. They believe living organisms may have been involved in the formation of the carbonate and some of the microscopic organisms may have fossilized in the rock.
Photographs show the carbonate as orange-brown in color with black and white rims.
Compounds in these rims are very similar to those produced on earth by bacteria. Even members of the investigative team were skeptical. Stanford University's Richard Zare noted that PAHs are present on earth in non-organic substances such as diesel exhaust, candle soot or even charred meat. It is possible that these substances originated on earth. There is such public zeal to throw out the Bible and believe in anything else, these announcements have unleashed a fury of conjectures.