Pebble-Sized Fossils Found on Comet 67P

Added on Aug. 29, 2015: Detailed reasons for the above claim
1. Earth has no “pebbles of organic materials” that are not life or remains of life.
2. Mars was formed at the same time as Earth was formed, after our Sun had been formed. 
3. Like Earth, Mars has a lot of remains of advanced life, as proven in 
http://wretchfossil.blogspot.tw/2014/09/most-amazing-photos-from-mars-prove-our.html?q=our+past+life+on+mars
Like Earth, Mars has no “pebbles of organic materials” that are not life or remains of life.
4. Comet 67P originated from Mars (see note 1 above), so the comet has no “pebbles of organic materials” that are not life or remains of life. That’s why the “pebbles of organic materials” are pebble-sized fossils.
5. Some people may object, as only small and simple organic molecules have been found on Comet 67P. Explanations: a. Many other research results are not yet published. b. The instruments on Rosetta and Philae spacecraft were designed to detect small organic molecules no larger than 300 daltons. c. Large fossils often break down into small fossil cells, which are rarely broken into indiscernible structure. However, solar radiation can break down the structures of proteins and large molecules within fossil cells into small organic molecules, which are smaller than 1,000 daltons. d. Even small organic molecules can be remains of life, not precursors to life (see 
http://wretchfossil.blogspot.tw/2015/08/mistaken-presumption-no-et-past-life.html?view=magazine)

Added on Sept. 24, 2015: “The VIRTIS spectrometer on board the Rosetta spacecraft has provided evidence of nonvolatile organic macromolecular compounds everywhere on the surface of comet 67P with little to no water ice visible.^[94] ”