From: Wretch Fossil on
Ribosome remains found in meteorite ALH84001

The following figure shows the remains of ribosomes and rough
endoplasmic reticulum that are found in Mars meteorite ALH84001. The
figure is a transmission electron microscopy taken by NASA scientists
at Johnson Space Center.
http://www.wretch.cc/album/show.php?i=lin440315&b=28&f=1176891238&p=121

Photo source and credit: See Page 18 in article at
http://www.nasa.gov/centers/johnson/pdf/403099main_GCA_2009_final_corrected.pdf