Discovered: 21 organic cell/tissue remains on Mars in a single
substrate.

Fig. 1 below shows 21 obvious Martian cell/tissue remains in a single
substrate of the optical microscope on board Phoenix Mars Lander . The
photomicrograph was taken on Sol 101. The issue should now be settled
regarding whether or not there were cells on
Mars.

Fig. 1: Cell remains A to E had diameters ranging from 13 micrometers
to 20 micrometers. Cell remains F to L had diameters ranging from 13
micrometers to 21 micrometers. The remainders were tissue remains of
26 to 29 micrometers in diameter.
http://www.wretch.cc/album/show.php?i=lin440315&b=20&f=1555314562&p=95

Source of Fig. 1:
http://www.flickr.com/photos/hortonheardawho/2835533347/