Related by context. Frequent words. (Click for all words.) 49 Stephen Hawking 49 cosmologist 49 particle physicist 48 Professor Hawking 48 theoretical physicist 48 Professor Stephen Hawking 47 physicist Stephen Hawking 46 Richard Feynman 46 astrophysicist 46 Hawking 45 astronomer 45 Phil Plait 45 Astronomer 44 Planetary Institute 44 Peter Diamandis 44 evolutionary biologist 44 Mathematician 44 astrobiologist 43 physicist 43 Physicist 43 planetary scientist 42 philosopher 42 Neuroscientist 41 Carl Sagan 41 Nobel Prize Winner 41 Buckminster Fuller 40 mathematician 40 theologian 40 Nobel Laureate 40 Nobelist 40 scientist 40 Ray Kurzweil 40 theoretical physicists 40 Planetary Sciences 39 Albert Einstein 39 biophysicist 39 astrobiologists 39 Astrobiology 39 intelligent beings 39 astrobiology 39 neurobiologist 39 evolutionary psychologist 39 Anthropologist 39 zoology professor 38 cosmologists 38 planetary sciences 38 Big Bang theory 38 bioengineer 38 atmospheric scientist 38 Nobel laureate 38 Templeton Prize 38 Steven Pinker 38 futurist 37 Richard Dawkins 37 evolutionist 37 physicists 37 Philosopher 37 Gliese #g 37 cosmology 37 Credit NASA JPL 37 astrophysics 37 Cosmology 37 astrophysicists 37 astronomy 37 biochemist 37 Boisselier 37 Berlinski 37 extraterrestrials 37 virologist 37 palaeontologist 37 astronaut 37 Astronomy 37 mathematicians 37 Trebek 37 Francis Crick 37 Planetary Science 37 Hayden Planetarium 37 Johannes Kepler 37 Darwin theory 36 theorist 36 Dean Kamen 36 Egyptologist 36 Cernan 36 Seismologist 36 molecular geneticist 36 evolutionary theory 36 Daniel Dennett 36 molecular biologist 36 atheist 36 Population Bomb 36 Creationist 36 stargazer 36 Roger Highfield 36 Holocaust survivor Elie Wiesel 36 Geneticist 36 Mario R. Capecchi 36 Paleontologist 36 planetary science 36 geoscientist 36 Reinhold Niebuhr 36 quantum physics