Chandra Wickramasinghe

Nalin Chandra Wickramasinghe (born 20 January 1939) is a Sri Lankan-born British mathematician, astronomer[1] and astrobiologist of Sinhalese ethnicity. His research interests include the interstellar medium, infrared astronomy, light scattering theory, applications of solid-state physics to astronomy, the early Solar System, comets, astrochemistry, the origin of life and astrobiology. A student and collaborator of Fred Hoyle, the pair worked jointly for over 40 years[2] as influential proponents of panspermia.[3][4] In 1974 they proposed the hypothesis that some dust in interstellar space was largely organic, later proven to be correct.[5][6][7]

Chandra Wickramasinghe
Chandra Wickramasinghe at the University of Buckingham
Born (1939-01-20) 20 January 1939
Colombo, British Ceylon
CitizenshipBritish
Alma materRoyal College, Colombo
University of Ceylon (BSc)
Cambridge University (PhD, ScD)
Known forOrganic composition of cosmic dust
AwardsFellow of Jesus College, Cambridge University (1963–1973)
Vidya Jyothi (1992)
Scientific career
FieldsAstrobiology
Astronomy
Mathematics
InstitutionsCambridge University
University College Cardiff
University of Cardiff
University of Buckingham
University of Ruhuna
Doctoral advisorFred Hoyle

Hoyle and Wickramasinghe have advanced the argument that various outbreaks of illnesses on Earth are of extraterrestrial origins, including the 1918 flu pandemic and certain outbreaks of polio and mad cow disease. For the 1918 flu pandemic they hypothesised that cometary dust brought the virus to Earth simultaneously at multiple locations—a view almost universally dismissed by experts on this pandemic.[8] Claims connecting terrestrial disease and extraterrestrial pathogens have been rejected by the scientific community.[8]

Wickramasinghe has written more than 30 books about astrophysics and related topics;[9] he has made appearances on radio, television and film, and he writes online blogs and articles. He has appeared on BBC Horizon, UK Channel 5 and the History Channel. He appeared on the 2013 Discovery Channel program "Red Rain".[10][11] He has an association with Daisaku Ikeda, president of the Buddhist sect Soka Gakkai International, that led to the publication of a dialogue with him, first in Japanese and later in English, on the topic of Space and Eternal Life.[12]

Education and career

Wickramasinghe studied at Royal College, Colombo, the University of Ceylon (where he graduated in 1960 with a BSc First Class Honours in mathematics), and at Trinity College and Jesus College, Cambridge, where he obtained his PhD and ScD degrees.[13] Following his education, Wickramasinghe was a Fellow of Jesus College, Cambridge from 1963 to 1973, until he became professor of applied mathematics and astronomy at University College Cardiff. Wickramasinghe was a consultant and advisor to the President of Sri Lanka from 1982 to 1984, and played a key role in founding the Institute of Fundamental Studies in Sri Lanka.

After fifteen years at University College Cardiff, Wickramasinghe took an equivalent position in the University of Cardiff, a post he held from 1990 until 2006.[14] After retirement in 2006, he incubated the Cardiff Center for Astrobiology as a special project reporting to the President of the University. In 2011 the project closed down, losing its funding in a series of UK educational cut backs. After this event, Wickramasinghe was offered the opportunity to move to the University of Buckingham as Director of the Buckingham Centre for Astrobiology, University of Buckingham where he has been since 2011. He maintains his part-time position as a UK Professor at Cardiff University. In 2015 he was elected Visiting scholar, Churchill College, Cambridge, England 2015/16.[15]

He is a co-founder and Board member of the Institute for the Study of Panspermia and Astroeconomics, set up in Japan in 2014,[16] and the Editor-in-Chief of the Journal of Astrobiology & Outreach. He was a Visiting By-Fellow, Churchill College, Cambridge, England 2015/16;[15] Professor and Director of the Buckingham Centre for Astrobiology at the University of Buckingham, a post he has held since 2011;[9] Affiliated Visiting Professor, University of Peradeniya, Sri Lanka;[17] and a Board Member and Research Director at the Institute for the Study of Panspermia and Astroeconomics, Ogaki-City, Gifu, Japan.[18]

In 2017, Professor Chandra Wickramasinghe was appointed Adjunct Professor in the Department of Physics, at the University of Ruhuna, Matara, Sri Lanka.[19]

Research

In 1960 he commenced work in Cambridge on his PhD degree under the supervision of Fred Hoyle, and published his first scientific paper "On Graphite Particles as Interstellar Grains” in Monthly Notices of the Royal Astronomical Society in 1962.[20] He was awarded a PhD degree in Mathematics in 1963 and was elected a Fellow of Jesus College Cambridge in the same year. In the following year he was appointed a Staff Member of the Institute of Astronomy, Cambridge. Here he continued to work on the nature of interstellar dust, publishing many papers in this field,[21] that led to a consideration of carbon-containing grains as well as the older silicate models.

Wickramasinghe published the first definitive book on Interstellar Grains in 1967.[22] He has made many contributions to this field, publishing over 350 papers in peer-reviewed journals, over 75 of which are in Nature. Hoyle and Wickramasinghe further proposed a radical kind of panspermia that included the claim that extraterrestrial life forms enter the Earth's atmosphere and were possibly responsible for epidemic outbreaks, new diseases, and genetic novelty that Hoyle and Wickramasinghe contended was necessary for macroevolution.[23]

Chandra Wickramasinghe had the longest-running collaboration with Fred Hoyle. Their publications on books and papers[21] arguing for panspermia and a cosmic hypothesis of life are controversial and, in particular detail, essentially contra the scientific consensus in both astrophysics and biology. Several claims made by Hoyle and Wickramasinghe between 1977 and 1981, such as a report of having detected interstellar cellulose, were criticised by one author as pseudoscience.[24]

Organic molecules in space

In 1974 Wickramasinghe first proposed the hypothesis that some dust in interstellar space was largely organic,[25] and followed this up with other research confirming the hypothesis.[26] Wickramasinghe also proposed and confirmed the existence of polymeric compounds based on the molecule formaldehyde (H2CO).[27] Fred Hoyle and Wickramasinghe later proposed the identification of bicyclic aromatic compounds from an analysis of the ultraviolet extinction absorption at 2175A.,[28] thus demonstrating the existence of polycyclic aromatic hydrocarbon molecules in space.

Hoyle–Wickramasinghe model of panspermia

Throughout his career, Wickramasinghe, along with his collaborator Fred Hoyle, has advanced the panspermia hypothesis, that proposes that life on Earth is, at least in part, of extraterrestrial origin.[29][30] The Hoyle–Wickramasinghe model of panspermia include the assumptions that dormant viruses and desiccated DNA and RNA can survive unprotected in space;[31] that small bodies such as asteroids and comets can protect the "seeds of life", including DNA and RNA,[32][33][34] living, fossilized, or dormant life, cellular[35][36] or non-cellular;[32][33][34][35][37][38][39][40] and that the collisions of asteroids, comets, and moons have the potential to spread these "seeds of life" throughout an individual star system and then onward to others.[37][40] The most contentious issue around the Hoyle–Wickramasinghe model of the panspermia hypothesis is the corollary of their first two propositions that viruses and bacteria continue to enter the Earth's atmosphere from space, and are hence responsible for many major epidemics throughout history.[41][42][43]

Towards the end of their collaboration, Wickramasinghe and Hoyle hypothesised that abiogenesis occurred close to the Galactic Center before panspermia carried life throughout the Milky Way,[44] and stated a belief that such a process could occur in many galaxies throughout the Universe.[45][46]

Scientists in North America, Europe, Russia, and Japan are testing many aspects of panspermia.[47] (Further information at Panspermia#Research in outer space.)

Detection of living cells in the stratosphere
An image of a clump of microorganisms from 41 km fluorescing on application of a carbocyanine dye (indicating viability) is shown in the left panel, and scanning electron microscope image of a similar clump is shown on the right panel.

On 20 January 2001 the Indian Space Research Organisation (ISRO) conducted a balloon flight from Hyderabad, India to collect stratospheric dust from a height of 41 km (135,000 ft) with a view to testing for the presence of living cells. The collaborators on this project included a team of UK scientists led by Wickramasinghe. In a paper presented at a SPIE conference in San Diego in 2002 the detection of evidence for viable microorganisms from 41 km above the Earth's surface was presented.[48] However, the experiment did not present evidence as to whether the findings are incoming microbes from space rather than microbes carried up to 41 km from the surface of the Earth.

In 2005 the ISRO group carried out a second stratospheric sampling experiment from 41 km altitude and reported the isolation of three new species of bacteria including one that they named Janibacter hoylei sp.nov. in honour of Fred Hoyle.[49] However, these facts do not prove that bacteria on Earth originated in the cosmic environment. Samplings of the stratosphere have also been carried out by Yang et al. (2005,[50] 2009[51]). During the experiment strains of highly radiation-resistant Deinococcus bacterium were detected at heights up to 35 km. Nevertheless, these authors have abstained from linking these discoveries to panspermia. Wickramasinghe was also involved in coordinating analyses of the red rain in Kerala in collaborations with Godfrey Louis.[52]

Extraterrestrial pathogens

Hoyle and Wickramasinghe have advanced the argument that various outbreaks of illnesses on Earth are of extraterrestrial origins, including the 1918 flu pandemic and certain outbreaks of polio and mad cow disease. For the 1918 flu pandemic they hypothesised that cometary dust brought the virus to Earth simultaneously at multiple locations—a view almost universally dismissed by external experts on this pandemic.[8]

On 24 May 2003 The Lancet published a letter from Wickramasinghe,[53] jointly signed by Milton Wainwright and Jayant Narlikar, in which they hypothesised that the virus that causes severe acute respiratory syndrome (SARS) could be extraterrestrial in origin instead of originating from chickens. The Lancet subsequently published three responses to this letter, showing that the hypothesis was not evidence-based, and casting doubts on the quality of the experiments referenced by Wickramasinghe in his letter.[54][55][56] Claims connecting terrestrial disease and extraterrestrial pathogens have been rejected by the scientific community.[8]

Wickramasinghe suggests that the 2019 coronavirus, SARS-CoV-2, came from outer space.[57] He says:

The sudden outbreak of a new coronavirus is very likely to have a space connection, the strong localisation of the virus within China is the most remarkable aspect of the disease. In October last year a fragment of a comet exploded in a brief flash in North East China. We think it probable that this contained embedded within it a monoculture of infective 2019-nCoV virus particles that survived in the interior of the incandescent meteor. We consider the seemingly outrageous possibility that hundreds of trillions of infective viral particles were then released embedded in the form of fine carbonaceous dust. We believe infectious agents are prevalent in space, carried on comets, and can fall towards Earth through the troposphere. These, we think, can and have in the past gone on to bring about human disease epidemics.[58]

Polonnaruwa
Main article: Polonnaruwa (meteorite)

On 29 December 2012 a green fireball was observed in Polonnaruwa Province, Sri Lanka.[59][60] It disintegrated into fragments that fell to the Earth near the villages of Aralaganwila and Dimbulagala and in a rice field near Dalukkane. Rock samples were submitted to the Medical Research Institute of the Ministry of Health in Colombo.

The rocks were sent to the University of Cardiff in Wales for analysis, where Chandra Wickramasinghe's team analyzed them and claimed that they contained extraterrestrial diatoms. From January to March 2013, five papers were published in the fringe Journal of Cosmology outlining various results from teams in the United Kingdom, United States and Germany.[61][62] However, independent experts in meteoritics stated that the object analyzed by Wickramasinghe's team was of terrestrial origin,[63][64] a fulgurite created by lightning strikes on Earth.[65] Experts in diatoms complemented the statement, saying that the organisms found in the rock represented a wide range of extant terrestrial taxa, confirming their earthly origin.[63]

Wickramasinghe and collaborators responded, using X-ray diffraction, oxygen isotope analysis, and scanning electron microscope observations, in a March 2013 paper asserting that the rocks they found were indeed meteorites,[66] instead of being created by lightning strikes on Earth as stated by scientists from the University of Peradeniya.[65][67]

Participation in the creation-evolution debate

Wickramasinghe and his mentor Fred Hoyle have also used their data to argue in favor of cosmic ancestry,[68][69][70][71][72][73] and against the idea of life emerging from inanimate objects by abiogenesis.[74]

Once again the Universe gives the appearance of being biologically constructed, and on this occasion on a truly vast scale. Once again those who consider such thoughts to be too outlandish to be taken seriously will continue to do so. While we ourselves shall continue to take the view that those who believe they can match the complexities of the Universe by simple experiments in their laboratories will continue to be disappointed.

Wickramasinghe attempts to present scientific evidence to support the notion of cosmic ancestry and "the possibility of high intelligence in the Universe and of many increasing levels of intelligence converging toward a God as an ideal limit."[75]

During the 1981 scientific creationist trial in Arkansas, Wickramasinghe was the only scientist testifying for the defense, which in turn was supporting creationism.[74][76] In addition, he wrote that the Archaeopteryx fossil finding is a forgery, a charge that the scientific community considers an "absurd" and "ignorant" statement.[77][78]

Honours and awards

Books
  • Interstellar Grains (Chapman & Hall, London, 1967)[22]
  • Light Scattering Functions for Small Particles with Applications in Astronomy (Wiley, New York, 1973)[79]
  • Solid-State Astrophysics (ed. with D.J. Morgan) (D. Reidel, Boston, 1975)
  • Interstellar Matter (with F.D. Khan & P.G. Mezger) (Swiss Society of Astronomy and Astrophysics, 1974)[80]
  • The Cosmic Laboratory (University College of Cardiff, 1975)[81]
  • Lifecloud: The Origin of Life in the Universe (with Fred Hoyle) (J.M. Dent, London, 1978)
  • Diseases from Space (with Fred Hoyle) (J.M. Dent, London, 1979)[82]
  • Origin of Life (with Fred Hoyle) (University College Cardiff Press, 1979)[83]
  • Space Travellers: The Bringers of Life (with Fred Hoyle) (University College Cardiff Press, 1981)
  • Evolution from Space (with Fred Hoyle) (J.M. Dent, London, 1981) ISBN 978-0-460-04535-3
  • Is Life an Astronomical Phenomenon? (University College Cardiff Press, 1982) ISBN 9780906449493
  • Why Neo-Darwinism Does Not Work (with Fred Hoyle) (University College Cardiff Press, 1982) ISBN 9780906449509
  • Proofs that Life is Cosmic (with Fred Hoyle) (Institute of Fundamental Studies, Sri Lanka, Memoirs no.1, 1982)[84]
  • From Grains to Bacteria (with Fred Hoyle) (University College Cardiff Press, 1984) ISBN 9780906449646
  • Fundamental Studies and the Future of Science (ed.) (University College Cardiff Press, 1984) ISBN 9780906449578
  • Living Comets (with Fred Hoyle) (University College Cardiff Press, 1985) ISBN 9780906449790
  • Archaeopteryx, the Primordial Bird (with Fred Hoyle) (Christopher Davies, Swansea, 1986) ISBN 9780715406656
  • The Theory of Cosmic Grains (with Fred Hoyle) (Kluwer, Dordrecht, 1991) ISBN 9780792311898
  • Life on Mars? The Case for a Cosmic Heritage (with Fred Hoyle) (Clinical Press, Bristol, 1997) ISBN 9781854570413
  • Astronomical Origins of Life: Steps towards Panspermia (with Fred Hoyle) (Kluwer, Dordrecht, 2000) ISBN 9780792360810
  • Cosmic Dragons: Life and Death on Our Planet (Souvenir Press, London, 2001) ISBN 9780285636064
  • Fred Hoyle’s Universe (ed. with G. Burbidge and J. Narlikar) (Kluwer, Dordrecht, 2003) ISBN 9781402014154
  • A Journey with Fred Hoyle (World Scientific, Singapore, 2005) ISBN 9789812565792
  • Comets and the Origin of Life (with J. Wickramasinghe and W. Napier) (World Scientific, Hackensack NJ, 2010) ISBN 9789812814005
  • A Journey with Fred Hoyle, Second Edition (World Scientific, Singapore, April 2013) ISBN 9789814436120
  • The search for our cosmic ancestry, World Scientific, New Jersey 2015, ISBN 978-981-461696-6.
  • Walker, Theodore; Wickramasinghe, Chandra (2015). The Big Bang and God An Astro-Theology. Palgrave Macmillan US. doi:10.1057/9781137535030. ISBN 978-1-349-57419-3.

Articles
  • Hoyle, F. and Wickramasinghe, N.C., 1962. On graphite particles as interstellar grains, Mon.Not.Roy.Astr.Soc. 124, 417-433[20]
  • Hoyle, F.; Wickramasinghe, N.C. (1969). "Interstellar Grains". Nature. 223 (5205): 450–462. Bibcode:1969Natur.223..459H. doi:10.1038/223459a0.
  • Wickramasinghe, N.C., 1974. Formaldehyde polymers in interstellar space, Nature 252, 462-463[85]
  • Wickramasinghe, N.C.; Hoyle, F.; Brooks, J.; Shaw, G. (1977). "Prebiotic polymers and infrared spectra of galactic sources". Nature. 269 (5630): 674–676. Bibcode:1977Natur.269..674W. doi:10.1038/269674a0.
  • Hoyle, F. and Wickramasinghe, N.C., 1977. Identification of the λ2,200A interstellar absorption feature, Nature 270, 323-324[85]
  • F., Hoyle; N. C., Wickramasinghe (1976-11-04). "Primitive grain clumps and organic compounds in carbonaceous chondrites" (PDF). Nature. 264 (5581): 45–46. Bibcode:1976Natur.264...45H. doi:10.1038/264045a0. Retrieved 2013-01-18.
  • Hoyle, F. and Wickramasinghe, N.C., 1977. Polysaccharides and infrared spectra of galactic sources, Nature 268, 610-612[86]
  • Hoyle, F.; Wickramasinghe, N.C. (1979). "On the nature of interstellar grains". Astrophysics and Space Science. 66: 77–90. Bibcode:1999Ap&SS.268..249H. doi:10.1023/A:1002462602776.
  • Hoyle, F.; Wickramasinghe, N.C. (1979). "Biochemical chromophores and the interstellar extinction at ultraviolet wavelengths". Astrophysics and Space Science. 65 (1): 241–244. Bibcode:1979Ap&SS..65..241H. doi:10.1007/BF00643503.
  • Hoyle, F.; Wickramasinghe, N.C.; Al-Mufti, S.; et al. (1982). "Infrared spectroscopy over the 2.9-3.9μm waveband in biochemistry and astronomy". Astrophysics and Space Science. 83: 405–409. Bibcode:1999Ap&SS.268..161H. doi:10.1023/A:1002417307802.
  • Hoyle, F.; Wickramasinghe, N.C.; Al-Mufti, S. (1982). "Organo-siliceous biomolecules and the infrared spectrum of the Trapezium nebula". Astrophysics and Space Science. 86 (1): 63–69. Bibcode:1982Ap&SS..86...63H. doi:10.1007/BF00651830.
  • Hoyle, F.; Wickramasinghe, N.C. (1983). "Bacterial life in space". Nature. 306 (5942): 420. Bibcode:1983Natur.306..420H. doi:10.1038/306420a0.
  • Hoyle, F. and Wickramasinghe, N.C., 1986. The case for life as a cosmic phenomenon, Nature 322, 509-511[87]
  • Hoyle, F. and Wickramasinghe, N.C., 1990. Influenza – evidence against contagion, Journal of the Royal Society of Medicine 83. 258-261[88]
  • Napier, W.M.; Wickramasinghe, J.T; Wickramasinghe, N.C. (2007). "The origin of life in comets". International Journal of Astrobiology. 6 (4): 321–323. Bibcode:2007IJAsB...6..321N. doi:10.1017/S1473550407003941.
  • Rauf, K.; Wickramasinghe, C. (2010). "Evidence for biodegradation products in the interstellar medium". International Journal of Astrobiology. 9 (1): 29–34. Bibcode:2010IJAsB...9...29R. CiteSeerX 10.1.1.643.9541. doi:10.1017/S1473550409990334.
  • Wickramasinghe, N. C. (2010). "The astrobiological case for our cosmic ancestry". International Journal of Astrobiology. 9 (2): 119–129. Bibcode:2010IJAsB...9..119W. doi:10.1017/S1473550409990413.
  • Wickramasinghe, N.C.; Wallis, J.; Wallis, D.H.; Schild, R.E.; Gibson, C.H. (2012). "Life-bearing planets in the solar vicinity". Astrophysics and Space Science. 341 (2): 295–9. Bibcode:2012Ap&SS.341..295W. doi:10.1007/s10509-012-1092-8.
  • Chandra Wickramasinghe, A Journey with Fred Hoyle: The Search for Cosmic Life, World Scientific Publishing, 2005, ISBN 981-238-912-1
  • Janaki Wickramasinghe, Chandra Wickramasinghe and William Napier, Comets and the Origin of Life, World Scientific Publishing, 2009, ISBN 981-256-635-X
  • Chandra Wickramasinghe and Daisaku Ikeda, Space and Eternal Life, Journeyman Press, 1998, ISBN 1-85172-060-X

See also

References
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  2. Wickramasinghe, Steve (2013). A Journey with Fred Hoyle. New York: World Scientific Publishing Co. Pte. Ltd. ISBN 978-981-4436-12-0.
  3. Napier, W.M. (2007). "Pollination of exoplanets by nebulae". Int. J. Astrobiol. 6 (3): 223–228. Bibcode:2007IJAsB...6..223N. doi:10.1017/S1473550407003710.
  4. Line, M.A. (2007). "Panspermia in the context of the timing of the origin of life and microbial phylogeny". Int. J. Astrobiol. 3. 6 (3): 249–254. Bibcode:2007IJAsB...6..249L. doi:10.1017/S1473550407003813.
  5. Wickramasinghe, D. T. & Allen, D. A. The 3.4-µm interstellar absorption feature. Nature 287, 518−519 (1980).
  6. Allen, D. A. & Wickramasinghe, D. T. Diffuse interstellar absorption bands between 2.9 and 4.0 µm. Nature 294, 239−240 (1981).
  7. Wickramasinghe, D. T. & Allen, D. A. Three components of 3–4 μm absorption bands. Astrophys. Space Sci. 97, 369−378 (1983).
  8. Joseph Patrick Byrne (2008). Encyclopedia of Pestilence, Pandemics, and Plagues. ABC-CLIO. pp. 454–455. ISBN 978-0-313-34102-1.
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  11. Connor, Steve (2011-03-01). "We're all aliens... how humans began life in outer space". The Independent. The Independent.
  12. Ikeda, Daisaku (1998). Space and Eternal Life: A Dialogue Between Chandra Wickramasinghe and Daisaku Ikeda. Journeyman Press. ISBN 9781851720613.
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  16. ISPA - About us Archived 2015-05-21 at the Wayback Machine.
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  18. Tokoro, Gensuke. "Professor". www.ispajapan.com/. Institute for the Study of Panspermia and Astroeconomics. Archived from the original on 18 May 2015. Retrieved 12 May 2015.
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  23. Fred Hoyle, Chandra Wickramasinghe and John Watson (1986). Viruses from Space and Related Matters. University College Cardiff Press.
  24. Brian L. Silver Professor of Physical Chemistry Technion Israel Institute of Technology (26 February 1998). The Ascent of Science. Oxford University Press, USA. pp. 341–2. ISBN 978-0-19-802769-0.
  25. Nature, vol: 252, 462, 1974; and Nature, Vol 268, 610, 1977.
  26. Wickramasinghe, D. T. & Allen, D. A. The 3.4-µm interstellar absorption feature. Nature 287, 518−519 (1980). Allen, D. A. & Wickramasinghe, D. T. Diffuse interstellar absorption bands between 2.9 and 4.0 µm. Nature 294, 239−240 (1981). Wickramasinghe, D. T. & Allen, D. A. Three components of 3–4 μm absorption bands. Astrophys. Space Sci. 97, 369−378 (1983).
  27. N.C. Wickramasinghe, Formaldehyde Polymers in Interstellar Space, Nature, 252, 462, 1974
  28. F. Hoyle and N.C. Wickramasinghe, Identification of the lambda 2200A interstellar absorption feature, Nature, 270, 323, 1977
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  30. Wickramasinghe, C. (2011). "Bacterial morphologies supporting cometary panspermia: a reappraisal". International Journal of Astrobiology. 10 (1): 25–30. Bibcode:2011IJAsB..10...25W. CiteSeerX 10.1.1.368.4449. doi:10.1017/S1473550410000157.
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  39. Hoyle, Fred (1981). Comets - a vehicle for panspermia. Dordrecht: D. Reidel Publishing Co. p. 227.
  40. Wallis, M.K.; Wickramasinghe N.C. (2004). "Interstellar transfer of planetary microbiota". Mon. Not. R. Astron. Soc. 348 (1): 52–57. Bibcode:2004MNRAS.348...52W. doi:10.1111/j.1365-2966.2004.07355.x.
  41. Hoyle, Fred (1979). Diseases from Space. London: J.M. Dent & Sons.
  42. Hoyle, Fred; Wickramasinghe, N.C. (1990). "Influenza – evidence against contagion". Journal of the Royal Society of Medicine. 83 (4): 258–261. doi:10.1177/014107689008300417. PMC 1292615. PMID 2342043.
  43. Hoyle, Fred (2000). Astronomical Origins of Life: Steps towards Panspermia. Dordrecht: Kluwer Academic Press.
  44. Wickramasinghe, Chandra; Hoyle, Fred (1998). "Miller-Urey Synthesis in the Nuclei of Galaxies". Astrophys. Space Sci. 259 (1): 99–103. Bibcode:1998Ap&SS.259...99W. doi:10.1023/A:1001579504620.
  45. Hoyle, Fred (1999). Astronomical Origins of Life; Steps Towards Panspermia. Kluwer Academic Press. ISBN 978-0-7923-6081-0.
  46. "Life is a cosmic phenomenon; Wickramasinghe – Hoyle theories vindicated by Piyavi Wijewardene". 2017-06-05.
  47. Tepfer, David Tepfer (December 2008). "The origin of life, panspermia and a proposal to seed the Universe". Plant Science. 175 (6): 756–760. doi:10.1016/j.plantsci.2008.08.007.
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  75. Fry, Iris, Emergence of Life on Earth: A Historical and Scientific Overview, Rutgers University Press, 2000 ISBN 978-0813527406
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