Below is a list of the guests from episodes that were first aired or last repeated in 2009. To listen, click on the episode title to go to that episode’s page.
| Name | Discipline/Profession | Episode Title | Episode Date | Last Aired |
|---|---|---|---|---|
| Douglas Carlton Abrams | Author | Say What? | 10/5/2009 | 8/30/2010 |
| Joel Achenbach | Journalism/Technical Writing | Extreme Geology | 10/12/2009 | 11/29/2010 |
| Mark Adams | Author | Skeptic Check: Playing Doctor | 5/25/2009 | 7/12/2010 |
| Philip Alcabes | Health/Medicine | Skeptic Check: Vaccines: Give ‘Em Your Best Shot | 11/30/2009 | 11/30/2009 |
| Robert Anderson | Planetary Science | Robots Call the Shots | 6/1/2009 | 5/3/2010 |
| Taft Armandroff | Astronomy | Aloha Astronomy | 9/28/2009 | 10/18/2010 |
| Robyn Asimov | Other | Robots Call the Shots | 6/1/2009 | 5/3/2010 |
| Quentin Baldwin | Neuroscience | What Were You Thinking? | 10/20/2008 | 8/31/2009 |
| Betsy Barton | Astronomy | Seeing Stars and Planets | 9/14/2009 | 9/14/2009 |
| Bill Bass | Anthropology | Grave Matters | 8/3/2009 | 7/19/2010 |
| Stephen Baxter | Author | Humans in Space… ace… ace | 10/6/2008 | 9/29/2009 |
| Stephen Benner | Biology | Carbon Your Enthusiasm | 1/26/2009 | 11/23/2009 |
| Deborah Bennett | Mathematics | What Were You Thinking? | 10/20/2008 | 8/31/2009 |
| Russell Blackford | Journalism/Technical Writing | Earth: A Century Hence | 8/17/2009 | 10/4/2010 |
| Charles Blue | Journalism/Technical Writing | Aloha Astronomy | 9/28/2009 | 10/18/2010 |
| John Bohannon | Journalism/Technical Writing | Seth’s Garage | 4/27/2009 | 6/7/2010 |
| John Tyler Bonner | Evolutionary Sciences | You’ve Been Slimed! | 3/16/2009 | 3/1/2010 |
| Donald Boozer | Humanities | Speaking Klingon | 7/7/2008 | 3/30/2009 |
| Andre Bormanis | Author | You’ve Been Slimed! | 3/16/2009 | 3/1/2010 |
| Ed Boyden | Neuroscience | Life of Brain | 4/6/2009 | 5/24/2010 |
| Stanley Brandes | Anthropology | Grave Matters | 8/3/2009 | 7/19/2010 |
| Michael Brown | Astronomy | Seeing Stars and Planets | 9/14/2009 | 9/14/2009 |
| Steve Brusatte | Biology | Seth’s Storage Locker | 10/19/2009 | 12/20/2010 |
| Julie Burges | Biology | Rxs Get Personal | 7/13/2009 | 8/9/2010 |
| John Cacioppo | Neuroscience | What Makes Us Human Part I: Others | 6/15/2009 | 9/13/2010 |
| Ken Caldeira | Earth Sciences/Ecology/Climate Change | Skeptic Check: Doomsday at the Movies | 8/10/2009 | 11/9/2009 |
| Nicholas Carr | Author | TXT MSG: Thought | 9/1/2008 | 7/20/2009 |
| Sean Carroll | Cosmology | Reading Life’s Tea Leaves | 4/20/2009 | 4/20/2009 |
| David Charbonneau | Astronomy | Scoping Out Astronomy | 1/21/2009 | 1/21/2009 |
| Julian Christou | Astronomy | Aloha Astronomy | 9/28/2009 | 10/18/2010 |
| Gregory Cochran | Physics | What Makes Us Human Part II: Adaptability | 6/22/2009 | 9/20/2010 |
| Michael Collins | Anthropology | Seth’s Storage Locker | 10/19/2009 | 12/20/2010 |
| Marina Davila-Ross | Psychology | What Makes Us Human Part I: Others | 6/15/2009 | 9/13/2010 |
| Terence Deacon | Anthropology | Speaking Klingon | 7/7/2008 | 3/30/2009 |
| David DeGusta | Anthropology | Say What? | 10/5/2009 | 8/30/2010 |
| Kathryn Denning | Anthropology | Seth’s Garage | 4/27/2009 | 6/7/2010 |
| Kathryn Denning | Anthropology | What Makes Us Human Part I: Others | 6/15/2009 | 9/13/2010 |
| Roe DeVasto | Other | Journey to a Black Hole | 12/21/2009 | 12/21/2009 |
| Ross Donaldson | Health/Medicine | Grave Matters | 8/3/2009 | 7/19/2010 |
| Michael Dosmann | Biology | Genes That Fit | 7/21/2008 | 5/4/2009 |
| Laurance Doyle | Astronomy | Say What? | 10/5/2009 | 8/30/2010 |
| Frank Drake | Astronomy | SETI: Now What? | 11/16/2009 | 3/29/2010 |
| Keir Dullea | Entertainment | Bodies in Motion | 6/8/2009 | 6/8/2009 |
| Jack Dumbacher | Biology | You Animal! | 4/28/2008 | 1/19/2009 |
| David Ewing Duncan | Journalism/Technical Writing | Rxs Get Personal | 7/13/2009 | 8/9/2010 |
| Sylvia Earle | Earth Sciences/Ecology/Climate Change | Seas the Moment | 5/11/2009 | 5/11/2009 |
| Bethany Ehlmann | Geology | Carbon Your Enthusiasm | 1/26/2009 | 11/23/2009 |
| Jonathan Eisen | Evolutionary Sciences | Genes That Fit | 7/21/2008 | 5/4/2009 |
| Richard Ellis | Astronomy | Aloha Astronomy | 9/28/2009 | 10/18/2010 |
| Dean Falk | Anthropology | What Makes Us Human Part I: Others | 6/15/2009 | 9/13/2010 |
| Helen Fisher | Anthropology | It’s the Science, Cupid! | 2/23/2009 | 2/1/2010 |
| BJ Fogg | Psychology | TXT MSG: Behavior | 9/8/2008 | 7/27/2009 |
| Cary Fowler | Industry | Earth: A Century Hence | 8/17/2009 | 10/4/2010 |
| Andrew Fraknoi | Astronomy | A Man, A Planet, A Tenal: Panama! | 3/2/2009 | 12/14/2009 |
| Mark Frank | Astronomy | Bodies in Motion | 6/8/2009 | 6/8/2009 |
| Douglas Fudge | Biology | You’ve Been Slimed! | 3/16/2009 | 3/1/2010 |
| Pablo Garcia | Robotics/IA | Robots Call the Shots | 6/1/2009 | 5/3/2010 |
| Michael Gazzaniga | Neuroscience | Life of Brain | 4/6/2009 | 5/24/2010 |
| Murray Gell-Mann | Physics | That’s Cosmic! | 12/8/2008 | 9/7/2009 |
| Andrea Ghez | Astronomy | Seth’s Garage | 4/27/2009 | 6/7/2010 |
| Jim Glass | Humanities | Speaking Klingon | 7/7/2008 | 3/30/2009 |
| Matthew Goodman | Author | Skeptic Check: Sheer Lunacy | 7/6/2009 | 9/27/2010 |
| Brian Greene | Physics | That’s Cosmic! | 12/8/2008 | 9/7/2009 |
| Jonathan Grudin | Industry | TXT MSG: Thought | 9/1/2008 | 7/20/2009 |
| Roger Hanlon | Biology | Feather Knows Best | 2/2/2009 | 12/7/2009 |
| Marc Hauser | Psychology | Why We Do What We Shoo Be Do Be Do | 8/8/2008 | 5/18/2009 |
| John-Dylan Haynes | Neuroscience | Why We Do What We Shoo Be Do Be Do | 8/8/2008 | 5/18/2009 |
| Tori Hoehler | Astrobiology | You’ve Been Slimed! | 3/16/2009 | 3/1/2010 |
| Paul Horowitz | Physics | SETI: Now What? | 11/16/2009 | 3/29/2010 |
| Sven Huseby | Entertainment | Seas the Moment | 5/11/2009 | 5/11/2009 |
| Marco Iacoboni | Psychology | Why We Do What We Shoo Be Do Be Do | 8/8/2008 | 5/18/2009 |
| Susan Jacoby | Author | Skeptical Sunday: Is Ignorance Bliss? | 5/19/2008 | 4/13/2009 |
| Steven Jefferts | Physics | Time’s Mysteries Part I: Marking Time | 11/3/2008 | 12/28/2009 |
| Jon Jenkins | Aeronautics/Space | Seeing Stars and Planets | 9/14/2009 | 9/14/2009 |
| Alex Kacelnik | Health/Medicine | You Animal! | 4/28/2008 | 1/19/2009 |
| Matt Kaeberlein | Earth Sciences/Ecology/Climate Change | Grave Matters | 8/3/2009 | 7/19/2010 |
| Pat Kambesis | Geology | Extreme Geology | 10/12/2009 | 11/29/2010 |
| Jim Kauahikaua | Geology | Extreme Geology | 10/12/2009 | 11/29/2010 |
| Jay Keasling | Engineering | Genes That Fit | 7/21/2008 | 5/4/2009 |
| Andrew Keen | Author | TXT MSG: Behavior | 9/8/2008 | 7/27/2009 |
| John Keller | Aeronautics/Space | Bodies in Motion | 6/8/2009 | 6/8/2009 |
| Leeka Kheifets | Health/Medicine | Skeptic Check: Mind Your Body | 10/26/2009 | 10/26/2009 |
| David Kirsch | Biology | TXT MSG: Thought | 9/1/2008 | 7/20/2009 |
| Robert Kirschner | Astronomy | Bodies in Motion | 6/8/2009 | 6/8/2009 |
| Richard Klein | Anthropology | What Were You Thinking? | 10/20/2008 | 8/31/2009 |
| Kris Koenig | Entertainment | Scoping Out Astronomy | 1/21/2009 | 1/21/2009 |
| Alan Kogut | Astronomy | Scoping Out Astronomy | 1/21/2009 | 1/21/2009 |
| Katrien Kolenberg | Astronomy | Seth’s Garage | 4/27/2009 | 6/7/2010 |
| David Korsmeyer | Aeronautics/Space | Earth: A Millennium Hence | 8/24/2009 | 10/11/2010 |
| Ray Kurzweil | Futurist | Do Computers Byte? | 11/2/2009 | 1/3/2011 |
| Danielle Lemay | Health/Medicine | Seth’s Garage | 4/27/2009 | 6/7/2010 |
| Peter Lemesurier | Author | Skeptical Sunday: Que Sera… No Sera? | 2/9/2009 | 2/9/2009 |
| Bill Leonard | Anthropology | Life of Brain | 4/6/2009 | 5/24/2010 |
| James Levine | Health/Medicine | TXT MSG: Behavior | 9/8/2008 | 7/27/2009 |
| Robert Levine | Psychology | Time’s Mysteries Part I: Marking Time | 11/3/2008 | 12/28/2009 |
| Mario Livio | Astronomy | Seth’s Garage | 4/27/2009 | 6/7/2010 |
| Gary Lockwood | Entertainment | Bodies in Motion | 6/8/2009 | 6/8/2009 |
| James Lovelock | Author | Earth: A Century Hence | 8/17/2009 | 10/4/2010 |
| John Mankins | Aeronautics/Space | Humans in Space… ace… ace | 10/6/2008 | 9/29/2009 |
| Jo Marchant | Author | Do Computers Byte? | 11/2/2009 | 1/3/2011 |
| Gary Marcus | Psychology | Feather Knows Best | 2/2/2009 | 12/7/2009 |
| Geoff Marcy | Astronomy | Seth’s Storage Locker | 10/19/2009 | 12/20/2010 |
| Lori Marino | Evolutionary Sciences | What Makes Us Human Part I: Others | 6/15/2009 | 9/13/2010 |
| Lori Marino | Evolutionary Sciences | You Animal! | 4/28/2008 | 1/19/2009 |
| Edward Martinez | Entertainment | Skeptic Check: Waking the Dead | 9/21/2009 | 9/21/2009 |
| Jaime Mateus | Aeronautics/Space | Bodies in Motion | 6/8/2009 | 6/8/2009 |
| Demetrios Matsakis | Astronomy | Time’s Mysteries Part I: Marking Time | 11/3/2008 | 12/28/2009 |
| Frank McCormick | Health/Medicine | Rxs Get Personal | 7/13/2009 | 8/9/2010 |
| Pat McKeague | Education | Skeptical Sunday: Take A Number | 3/23/2009 | 3/23/2009 |
| Michael Merzenich | Neuroscience | Building Better Brains | 6/9/2008 | 3/9/2009 |
| Sharon Moalem | Neuroscience | Rxs Get Personal | 7/13/2009 | 8/9/2010 |
| Peter Moeller | Chemistry | Seas the Moment | 5/11/2009 | 5/11/2009 |
| Norman Mohr | Other | Time’s Mysteries Part I: Marking Time | 11/3/2008 | 12/28/2009 |
| Charles Moore | Earth Sciences/Ecology/Climate Change | Earth: A Millennium Hence | 8/24/2009 | 10/11/2010 |
| Virginia Morell | Author | You Animal! | 4/28/2008 | 1/19/2009 |
| David Morrison | Planetary Science | Skeptic Check: Doomsday at the Movies | 8/10/2009 | 11/9/2009 |
| Michael Mumma | Planetary Science | Carbon Your Enthusiasm | 1/26/2009 | 11/23/2009 |
| John Murlis | Industry | Carbon Your Enthusiasm | 1/26/2009 | 11/23/2009 |
| Robert Nadeau | Geology | Extreme Geology | 10/12/2009 | 11/29/2010 |
| Gary Niederhoff | Other | Journey to a Black Hole | 12/21/2009 | 12/21/2009 |
| Steven Novella | Neuroscience | Skeptic Check: Playing Doctor | 5/25/2009 | 7/12/2010 |
| Steven Novella | Neuroscience | Skeptic Check: Vaccines: Give ‘Em Your Best Shot | 11/30/2009 | 11/30/2009 |
| Akira O’Connor | Psychology | Skeptical Sunday: Que Sera… No Sera? | 2/9/2009 | 2/9/2009 |
| Pacific Ocean | Earth Sciences/Ecology/Climate Change | Seas the Moment | 5/11/2009 | 5/11/2009 |
| Paul Offit | Health/Medicine | Skeptic Check: Vaccines: Give ‘Em Your Best Shot | 11/30/2009 | 11/30/2009 |
| Peggy Orenstein | Journalism/Technical Writing | Do Computers Byte? | 11/2/2009 | 1/3/2011 |
| Dennis Overbye | Journalism/Technical Writing | Skeptic Check: Mind Your Body | 10/26/2009 | 10/26/2009 |
| Sean Owens | Health/Medicine | Rxs Get Personal | 7/13/2009 | 8/9/2010 |
| David Parker | Theology | Skeptical Sunday: Take A Number | 3/23/2009 | 3/23/2009 |
| Jay Pasachoff | Astronomy | Seeing Stars and Planets | 9/14/2009 | 9/14/2009 |
| Jonathan Payne | Geology | Feather Knows Best | 2/2/2009 | 12/7/2009 |
| Ian Pearson | Futurist | Life of Brain | 4/6/2009 | 5/24/2010 |
| Roland Pease | Journalism/Technical Writing | Journey to a Black Hole | 12/21/2009 | 12/21/2009 |
| Irene Pepperberg | Biology | Feather Knows Best | 2/2/2009 | 12/7/2009 |
| Cynthia Phillips | Planetary Science | Skeptic Check: Sheer Lunacy | 7/6/2009 | 9/27/2010 |
| Chris Phoenix | Technology | You’ve Been Slimed! | 3/16/2009 | 3/1/2010 |
| Tom PIerson | Industry | SETI: Now What? | 11/16/2009 | 3/29/2010 |
| Stephen Pinker | Psychology | What Were You Thinking? | 10/20/2008 | 8/31/2009 |
| Stephen Pinker | Psychology | Seth’s Storage Locker | 10/19/2009 | 12/20/2010 |
| Skyler Place | Psychology | It’s the Science, Cupid! | 2/23/2009 | 2/1/2010 |
| Phil Plait | Astronomy | Skeptic Check: Playing Doctor | 5/25/2009 | 7/12/2010 |
| Phil Plait | Astronomy | Skeptic Check: Doomsday at the Movies | 8/10/2009 | 11/9/2009 |
| Phil Plait | Astronomy | Skeptic Check: Sheer Lunacy | 7/6/2009 | 9/27/2010 |
| Phil Plait | Astronomy | Skeptical Sunday: Is Ignorance Bliss? | 5/19/2008 | 4/13/2009 |
| Phil Plait | Astronomy | Skeptic Check: Mind Your Body | 10/26/2009 | 10/26/2009 |
| Phil Plait | Astronomy | Skeptic Check: Waking the Dead | 9/21/2009 | 9/21/2009 |
| Phil Plait | Astronomy | Skeptical Sunday: Take A Number | 3/23/2009 | 3/23/2009 |
| Katherine Pollard | Biology | What Makes Us Human Part II: Adaptability | 6/22/2009 | 9/20/2010 |
| Carolyn Porco | Planetary Science | A Man, A Planet, A Tenal: Panama! | 3/2/2009 | 12/14/2009 |
| Patrick Porter | Other | Journey to a Black Hole | 12/21/2009 | 12/21/2009 |
| A. K. Pradeep | Neuroscience | What Were You Thinking? | 10/20/2008 | 8/31/2009 |
| Peter Pringle | Journalism/Technical Writing | Skeptical Sunday: Is Ignorance Bliss? | 5/19/2008 | 4/13/2009 |
| Xavier Prochaska | Astronomy | Scoping Out Astronomy | 1/21/2009 | 1/21/2009 |
| June Pulliam | History | Skeptic Check: Sheer Lunacy | 7/6/2009 | 9/27/2010 |
| Ben Radford | Sociology | Skeptical Sunday: Que Sera… No Sera? | 2/9/2009 | 2/9/2009 |
| Lisa Randall | Physics | That’s Cosmic! | 12/8/2008 | 9/7/2009 |
| Galen Rathbun | Biology | You Animal! | 4/28/2008 | 1/19/2009 |
| Ed Regis | Author | Genes That Fit | 7/21/2008 | 5/4/2009 |
| Koa Rice | Sociology | Aloha Astronomy | 9/28/2009 | 10/18/2010 |
| Brendan Riley | Humanities | Skeptic Check: Waking the Dead | 9/21/2009 | 9/21/2009 |
| Lilia Roman | Other | Journey to a Black Hole | 12/21/2009 | 12/21/2009 |
| Steven Rose | Biology | Life of Brain | 4/6/2009 | 5/24/2010 |
| Lynn Rothschild | Biology | Skeptic Check: Doomsday at the Movies | 8/10/2009 | 11/9/2009 |
| Robert Sapolsky | Biology | What Makes Us Human Part II: Adaptability | 6/22/2009 | 9/20/2010 |
| Lisa Schoonerman | Industry | Building Better Brains | 6/9/2008 | 3/9/2009 |
| Rusty Schweickart | Aeronautics/Space | Humans in Space… ace… ace | 10/6/2008 | 9/29/2009 |
| Paul Sereno | Biology | Reading Life’s Tea Leaves | 4/20/2009 | 4/20/2009 |
| Seth Shostak | Astronomy | Reading Life’s Tea Leaves | 4/20/2009 | 4/20/2009 |
| Adam Showman | Planetary Science | Seth’s Storage Locker | 10/19/2009 | 12/20/2010 |
| Neil Shubin | Biology | You Animal! | 4/28/2008 | 1/19/2009 |
| Charles Siebert | Neuroscience | What Makes Us Human Part I: Others | 6/15/2009 | 9/13/2010 |
| Steve Silberman | Journalism/Technical Writing | Skeptic Check: Mind Your Body | 10/26/2009 | 10/26/2009 |
| P. W. Singer | Military | Robots Call the Shots | 6/1/2009 | 5/3/2010 |
| Gordy Slack | Journalism/Technical Writing | Building Better Brains | 6/9/2008 | 3/9/2009 |
| Mark Slater | Music | Scoping Out Astronomy | 1/21/2009 | 1/21/2009 |
| Robert Smith? | Mathematics | Skeptic Check: Waking the Dead | 9/21/2009 | 9/21/2009 |
| Yi So-yeon | Engineering | Humans in Space… ace… ace | 10/6/2008 | 9/29/2009 |
| Sanjoy Som | Astrobiology | Humans in Space… ace… ace | 10/6/2008 | 9/29/2009 |
| Paul Spudis | Planetary Science | Skeptic Check: Sheer Lunacy | 7/6/2009 | 9/27/2010 |
| Allen Stairs | Philosophy | Why We Do What We Shoo Be Do Be Do | 8/8/2008 | 5/18/2009 |
| Simon Steel | Astronomy | Scoping Out Astronomy | 1/21/2009 | 1/21/2009 |
| Alan Stern | Planetary Science | A Man, A Planet, A Tenal: Panama! | 3/2/2009 | 12/14/2009 |
| Fred Stutzman | Humanities | Do Computers Byte? | 11/2/2009 | 1/3/2011 |
| Jill Tarter | Astronomy | SETI: Now What? | 11/16/2009 | 3/29/2010 |
| Jill Tarter | Astronomy | A Man, A Planet, A Tenal: Panama! | 3/2/2009 | 12/14/2009 |
| Edward Tenner | Journalism/Technical Writing | TXT MSG: Behavior | 9/8/2008 | 7/27/2009 |
| Jim Thomas | Journalism/Technical Writing | Genes That Fit | 7/21/2008 | 5/4/2009 |
| Chris Turney | Geology | Time’s Mysteries Part I: Marking Time | 11/3/2008 | 12/28/2009 |
| Neil deGrasse Tyson | Astronomy | A Man, A Planet, A Tenal: Panama! | 3/2/2009 | 12/14/2009 |
| James Underdown | Sociology | Skeptic Check: Playing Doctor | 5/25/2009 | 7/12/2010 |
| James Underdown | Sociology | Skeptic Check: Sheer Lunacy | 7/6/2009 | 9/27/2010 |
| James Underdown | Sociology | Skeptical Sunday: Is Ignorance Bliss? | 5/19/2008 | 4/13/2009 |
| James Underdown | Sociology | Skeptical Sunday: Take A Number | 3/23/2009 | 3/23/2009 |
| Dan Vado | Industry | Skeptic Check: Waking the Dead | 9/21/2009 | 9/21/2009 |
| Douglas Vakoch | Sociology | Say What? | 10/5/2009 | 8/30/2010 |
| Douglas Vakoch | Sociology | Speaking Klingon | 7/7/2008 | 3/30/2009 |
| Douglas Vakoch | Sociology | Earth: A Millennium Hence | 8/24/2009 | 10/11/2010 |
| Douglas Vakoch | Sociology | Journey to a Black Hole | 12/21/2009 | 12/21/2009 |
| Jeffrey Van Cleve | Astronomy | A Man, A Planet, A Tenal: Panama! | 3/2/2009 | 12/14/2009 |
| Craig Venter | Genetics/Genomics | Rxs Get Personal | 7/13/2009 | 8/9/2010 |
| Matthew Wald | Journalism/Technical Writing | Earth: A Millennium Hence | 8/24/2009 | 10/11/2010 |
| Wendell Wallach | Biology | Robots Call the Shots | 6/1/2009 | 5/3/2010 |
| Sam Wang | Neuroscience | Building Better Brains | 6/9/2008 | 3/9/2009 |
| Dan Werthimer | Astronomy | SETI: Now What? | 11/16/2009 | 3/29/2010 |
| Allen West | Physics | Carbon Your Enthusiasm | 1/26/2009 | 11/23/2009 |
| Will Whitehorn | Aeronautics/Space | Humans in Space… ace… ace | 10/6/2008 | 9/29/2009 |
| David Wilkinson | Theology | That’s Cosmic! | 12/8/2008 | 9/7/2009 |
| Richard Wiseman | Psychology | Skeptical Sunday: Take A Number | 3/23/2009 | 3/23/2009 |
| Stephen Wolfram | Mathematics | Do Computers Byte? | 11/2/2009 | 1/3/2011 |
| Sarah Woodley | Biology | It’s the Science, Cupid! | 2/23/2009 | 2/1/2010 |
| Richard Wrangham | Anthropology | What Makes Us Human Part II: Adaptability | 6/22/2009 | 9/20/2010 |
| Ashley Yeager | Astronomy | Aloha Astronomy | 9/28/2009 | 10/18/2010 |
| Larry Young | Neuroscience | It’s the Science, Cupid! | 2/23/2009 | 2/1/2010 |
| Jim Yount | Industry | Skeptic Check: Waking the Dead | 9/21/2009 | 9/21/2009 |
| Jan Zalasiewicz | Geology | Earth: A Millennium Hence | 8/24/2009 | 10/11/2010 |
| Patricia Zaradic | Earth Sciences/Ecology/Climate Change | TXT MSG: Behavior | 9/8/2008 | 7/27/2009 |
| Jonathan Zittrain | Author | TXT MSG: Thought | 9/1/2008 | 7/20/2009 |
| Jan Zivic | Industry | Building Better Brains | 6/9/2008 | 3/9/2009 |
| Ben Zuckerman | Physics | SETI: Now What? | 11/16/2009 | 3/29/2010 |
| Marlene Zuk | Evolutionary Sciences | It’s the Science, Cupid! | 2/23/2009 | 2/1/2010 |
