Isaac Asimov was a Russian-born, American author, a professor of biochemistry, and a highly successful writer, best known for his works of science fiction and for his popular science books. Professor Asimov is generally considered one of the most prolific writers of all time, having written or edited more than 500 books and an estimated 90,000 letters and postcards. He has works published in nine of the ten major categories of the Dewey Decimal System (lacking only an entry in the 100s category of Philosophy). Asimov is widely considered a master of the science-fiction genre and, along with Robert A. Heinlein and Arthur C. Clarke, was considered one of the "Big Three" science-fiction writers during his lifetime. Asimov's most famous work is the Foundation Series; his other major series are the Galactic Empire series and the Robot series, both of which he later tied into the same fictional universe as the Foundation Series to create a unified "future history" for his stories much like those pioneered by Robert A. Heinlein and previously produced by Cordwainer Smith and Poul Anderson. He penned numerous short stories, among them "Nightfall", which in 1964 was voted by the Science Fiction Writers of America the best short science fiction story of all time, a title many still honor. He also wrote mysteries and fantasy, as well as a great amount of nonfiction. Asimov wrote the Lucky Starr series of juvenile science-fiction novels using the pen name Paul French. Most of Asimov's popularized science books explain scientific concepts in a historical way, going as far back as possible to a time when the science in question was at its simplest stage. He often provides nationalities, birth dates, and death dates for the scientists he mentions, as well as etymologies and pronunciation guides for technical terms. Examples include his Guide to Science, the three volume set Understanding Physics, and Asimov's Chronology of Science and Discovery. Asimov was a long-time member and Vice President of Mensa International, albeit reluctantly; he described some members of that organization as "brain-proud and aggressive about their IQs" He took more joy in being president of the American Humanist Association. The asteroid 5020 Asimov, the magazine Asimov's Science Fiction, a Brooklyn, NY elementary school, and two different Isaac Asimov Awards are named in his honor.

John R. Gribbin is a British science writer, an astrophysicist, and a visiting fellow in astronomy at the University of Sussex. The topical range of his prolific writings includes quantum physics, biographies of famous scientists, human evolution, the origins of the universe, climate change and global warming. His also writes science fiction. John Gribbin graduated with his bachelor's degree in physics from the University of Sussex in 1966. Gribbin then earned his master of science (M.Sc.) degree in astronomy in 1967, also from the Univ. of Sussex, and he earned his Ph.D. in astrophysics from the University of Cambridge (1971). In 1968, Gribbin worked as one of Fred Hoyle's research students at the Institute of Theoretical Astronomy, and wrote a number of stories for New Scientist about the Institute's research and what were eventually discovered to be pulsars. In 1974, Gribbin published, along with Stephen Plagemann, a book titled The Jupiter Effect, that predicted that the alignment of the planets in quadrant on one side of the Sun on March 10, 1982 would cause gravitational effects that would trigger earthquakes in the San Andreas fault, possibly wiping out Los Angeles and its suburbs. Gribbin repudiated The Jupiter Effect in the July 17, 1980, issue of New Scientist magazine in which he stated that he had been "too clever by half". In 1984, Gribbin published In Search of Schrodinger's Cat: Quantum Physics and Reality, the book that he is best known for, which continues to sell well 28 years after publication. It has been described as among the best of the first wave of physics popularisations preceding Stephen Hawking's multi-million-selling A Brief History of Time. Gribbin's book has been cited as an example of how to revive an interest in the study of mathematics. In 2006, Gribbin took part in a BBC radio 4 broadcast as an "expert witness". Presenter Matthew Parris discussed with Professor Kathy Sykes and Gribbin whether Einstein "really was a 'crazy genius' ". At the 2009 World Conference of Science Journalists, the Association of British Science Writers presented Gribbin with their Lifetime Achievement award.