*Professor Pranab kumar Bhattacharya- MD(cal) Patho, FIC Path(Ind),Presently Professor& HOD of Pathology, convenor incharge DCP and DLT course WBUHS Calcutta school of Tropical Medicine, The Medical college, 108, CR Avenue Kolkata -73, Ex Professor &HOD RIO Medical college Kolkata , EX professor of WBUHS ;EX Additional Professor of department of Pathology, Institute of Post Graduate Medical Education & Research,244 AJC Bose Road, Kolkata-20, West Bengal, India* Miss Upasana Bhattacharya-only daughter of prof.Pranab Kumar Bhattacharya** Mr. Rupak Bhattacharya-Bsc(cal), Msc(JU), 7/51 Purbapalli, Sodepur, Dist 24 Parganas(north) Kol-110,West Bengal, India ***Mr.Ritwik Bhattacharya B.com(cal),** Miss Rupsa Bhattacharya ***Mr Soumyak Bhattacharya BHM MSc Student PUSHA New Delhi of residence7/51 Purbapalli, Sodepur, Dist 24 parganas(north) ,Kolkata-110,WestBengal, India**** Mrs. Dalia Mukherjee BA(hons) Cal, Swamiji Road, South Habra, 24 Parganas(north) West Bengal, India**** Miss oaindrila Mukherjee-Student , Mr DEbasis Mukherjee Bsc(cal) Swamiji Road, South Habra, 24 Parganas(north), West Bengal, India****; Mr. Surajit Sarkar BSC DMLT Technician Pathology, Institute of Post Graduate Medical Education & Research,244 a AJC Bose Road, Kolkata-20, West Bengal, India , Kolkata-20
For last decade, geologists also have looked at water droplets entangled in ancient Rocks -- called fluid inclusions – of thousands years old trapped in the rocks found in death valley or saline valley of California USA and from Michigan, Kansas and Italy[ temperature in these locations are 130 degree Fahrenheit or more] and they wondered that microbes could be extracted from them. Fluid inclusions have been found inside salt crystals ranging in age from thousands to hundreds of millions years old. But there had always been a question about whether the organisms cultured from salt crystals are genuinely ancient material or of extraterrestrial origin or whether they are modern-day world contaminants,[science daily 22nd November-2010] and research on reviewed existing literature and they confirmed that microbes or allege DNA were over 100,000 years back and could survive as the conditions inside these water droplets are ideally suited to preserving their DNA
Richard Hoover  very recently had discovered evidence of microfossils similar to Cyanobacteria, as we discussed early in the article, in freshly fractured slices of the interior surfaces of the Alais, Ivuna, and Orgueil CI1 carbonaceous meteorites and in ALH 84001 meteorite based on Field Emission Scanning Electron Microscopy (FESEM) and other measures, This me- teorite seemed to have been ejected from the Planet Mars on earth, a few billion years ago and after a long and circuitous journey fell to Earth and remained buried in the Antarctic region for a few thousand years. Woo ! it proves pan-spermia theory and life in this planet appeared from Asteroids [1,13] Richard Hoover  has concluded they are indigenous to these meteors and are similar to trichomic cyanobacteria and other trichomic prokaryotes such as filamentous sulfur bacteria. He concludes these fossilized bacteria are not Earthly contaminants at all but are the fossilized remains of living organisms which lived in the parent bodies of these meteors, e.g. comets, moons, and other astral bodies. The implications are that life is everywhere, and that life on Earth may have come from other planets. [1,13]. Based on a genomic analysis, that DNA-based life has a genetic ancestry leading backwards in time over 10 billion years [8,9,10] (Joseph, Wickramasinghe, Wainwright 2011; Sharov 2009), which is twice the age of Earth.
3] .Nagy, B., Fredriksson, K., Urey, H.C., Claus, G.,
4] Levin, G. V. and Straat, P.A. (1976) Viking labeled release biology experiment: Interim results. Science 194, 1322-1329.
5] Engel, M.H. and Nagy, B. (1982) Distribution and enantiomeric composition of amino acids in the Murchison meteorite. Nature 296, 837-840
6] McKay, D.S., Gibson, E.K., Thomas-Keprta, K.L., Vali, H., Romanek, C.S., Clemett, S.J., Chillier, X.D.F., Maedling, C.R. and Zare, R.N. (1996) Search for past life on Mars: Possible relic biogenic activity in Martian meteorite ALH84001. Science 273, 924-930
9] Wickramasinghe, C. (2011). The Biological Big Bang: Panspermia and the Origins of Life. Cosmology Science Publishers,
10] Sharov, A.A. (2009). Exponential Increase of Genetic Complexity Supports Extra-Terrestrial Origin of Life. Journal of Cosmology, 1, 63-65.
14]Filamentous figments in the Apex Cherts Tiny filaments thought to be ancient fossils are shown to be inorganic Nature News Published online 20 February 2011 | Nature | doi:10.1038/news.2011.110
Please see also the links