| 1 | — |  | Hidden Brain | Hidden Brain, Shankar Vedantam | |
| 2 | — |  | Unexplainable | Vox | |
| 3 | 2 |  | StarTalk Radio | Neil deGrasse Tyson | |
| 4 | 2 |  | The Resetter Podcast with Dr. Mindy | Dr. Mindy Pelz | |
| 5 | 1 |  | Ologies with Alie Ward | Alie Ward | |
| 6 | 7 |  | Discovery | BBC World Service | |
| 7 | 4 |  | Making Sense with Sam Harris | Sam Harris | |
| 8 | 3 |  | The Naked Scientists Podcast | The Naked Scientists | |
| 9 | 2 |  | Radiolab | WNYC Studios | |
| 10 | 2 |  | The Infinite Monkey Cage | BBC Radio 4 | |
| 11 | 53 |  | This Podcast Will Kill You | Exactly Right and iHeartPodcasts | |
| 12 | — |  | Short Wave | NPR | |
| 13 | 3 |  | Psychiatry & Psychotherapy Podcast | David Puder, M.D. | |
| 14 | 5 |  | Uncharted with Hannah Fry | BBC Radio 4 | |
| 15 | 36 |  | Science Friday | Science Friday and WNYC Studios | |
| 16 | 2 |  | BBC Inside Science | BBC Radio 4 | |
| 17 | — | L | Let's Talk Micro | Luis Plaza | |
| 18 | 9 |  | Curious Cases | BBC Radio 4 | |
| 19 | 5 |  | Daniel and Kelly’s Extraordinary Universe | iHeartPodcasts | |
| 20 | 19 |  | Living Planet | DW | |
| 21 | 6 |  | Science Vs | Spotify Studios | |
| 22 | 39 |  | The Social Work Podcast | Jonathan B. Singer, Ph.D., LCSW | |
| 23 | 6 |  | Science Weekly | The Guardian | |
| 24 | 8 |  | DarkHorse Podcast | Bret Weinstein & Heather Heying | |
| 25 | 3 |  | You Are Not So Smart | You Are Not So Smart | |
| 26 | 99 |  | Nephilim Death Squad | TopLobsta Productions | |
| 27 | — | T | The Grazing Game Podcast | Cam Griffin | |
| 28 | 73 | T | The Cancer Researcher Podcast | The European Association for Cancer Research (EACR) | |
| 29 | — |  | Ciência Suja | Ciência Suja | |
| 30 | 86 |  | Most Terrifying Places in America | Travel Channel | |
| 31 | — |  | The Answer Is Transaction Costs | Michael Munger | |
| 32 | — |  | Head Shepherd | Mark Ferguson | |
| 33 | 5 |  | Sean Carroll's Mindscape: Science, Society, Philosophy, Culture, Arts, and Ideas | Sean Carroll | |
| 34 | — |  | The Plodcast | Our Media | |
| 35 | 10 |  | Reinvent Yourself with Dr. Tara | Dr. Tara Swart Bieber | |
| 36 | 118 | C | Conversations in Drug Development | Boyds | |
| 37 | 137 | T | The Best of Making Sense with Sam Harris | Sam Harris | |
| 38 | 1 |  | The Skeptics' Guide to the Universe | Dr. Steven Novella | |
| 39 | 20 | B | BJA Education Podcasts | BJA Education | |
| 40 | — |  | So Cultured Podcast | Liv Grant & Taz Shipley | |
| 41 | 119 |  | This Week in Virology | Vincent Racaniello | |
| 42 | 147 | T | The Stem Cell Report with Martin Pera | ISSCR | |
| 43 | 126 | T | The Science Behind That | Atticus.hamilton | |
| 44 | — | A | Anatomy On The Go | Seth Jump | |
| 45 | 19 |  | Science Quickly | Scientific American | |
| 46 | — | M | Mathematics Simplified | Anjali Sharma | |
| 47 | — |  | Psychedelics Then and Now with Zach Leary | Zach Leary/Psychedelics Today | |
| 48 | 15 |  | Paranormal Mysteries | Nic Ryan | Paranormal Mysteries Podcast | |
| 49 | 19 |  | TheThinkingAtheist | The Thinking Atheist | |
| 50 | — | T | This Wild Life Conservation Podcast | Amy Turner | |
| 51 | 31 | G | Goodfellow Unit | Goodfellow Unit | |
| 52 | — | T | The Planet Earth Podcast | BBC Radio 4 | |
| 53 | — | R | Real Science Exchange-Dairy | Balchem Animal Nutrition & Health | |
| 54 | — |  | The Dairy Podcast Show | Wisenetix | |
| 55 | — | T | The New Dermatologist | 11-29 Media | |
| 56 | — | P | Play Therapy Community | Jackie Flynn, EMDRIA Approved Consultant | |
| 57 | — | W | What Lies Beyond Podcast | Matt Colborn | |
| 58 | — | C | Conversing with Nature | Nature Based Exchange | |
| 59 | — | T | The Social Brain | Taylor Guthrie and Andrew Cooper Sansone | |
| 60 | 36 |  | More or Less | BBC Radio 4 | |
| 61 | 40 |  | All In The Mind | ABC | |
| 62 | 6 |  | Blurry Creatures | Blurry Creatures | |
| 63 | 27 |  | Sasquatch Chronicles | Sasquatch Chronicles - Bigfoot Encounters | |
| 64 | 2 |  | Overheard at National Geographic | National Geographic | |
| 65 | 33 |  | 5 Live Science Podcast | BBC Radio 5 Live | |
| 66 | 14 |  | Something You Should Know | Mike Carruthers | OmniCast Media | |
| 67 | 36 | T | The Cosmic Savannah | The Cosmic Savannah | |
| 68 | 45 |  | Wild Times: Wildlife Education | Wildlife Educator - Forrest Galante | |
| 69 | 25 |  | Inner Cosmos with David Eagleman | iHeartPodcasts | |
| 70 | 13 |  | The Confessionals | Merkel Media | |
| 71 | 48 |  | NASA's Curious Universe | National Aeronautics and Space Administration (NASA) | |
| 72 | 18 |  | Crash Course Pods: The Universe | Crash Course Pods, Complexly | |
| 73 | 3 |  | Stuff To Blow Your Mind | iHeartPodcasts | |
| 74 | 14 |  | The Orthobullets Podcast | Orthobullets | |
| 75 | 25 | C | Canine Nation | Eric Brad | |
| 76 | 41 |  | Planetary Radio: Space Exploration, Astronomy and Science | The Planetary Society | |
| 77 | 34 |  | MinuteEarth | Minute Earth | |
| 78 | 44 |  | Navigating Neuropsychology | John Bellone & Ryan Van Patten - NavNeuro | |
| 79 | 41 | P | Pharmacology Basics | Instructor Gwin | |
| 80 | 40 |  | Behavioral Grooves Podcast | Kurt Nelson, PhD and Tim Houlihan | |
| 81 | 39 | E | Energized: The Future of Energy | GZERO Media | |
| 82 | 7 |  | CrowdScience | BBC World Service | |
| 83 | 42 |  | Completely Arbortrary | Completely Arbortrary | |
| 84 | 26 |  | Relebogile Mabotja hosts The Naked Scientist | Radio 702 | |
| 85 | 40 | T | The Neuro Clinic | Ingram Wright | |
| 86 | 40 |  | TED Talks Science and Medicine | TED | |
| 87 | 40 |  | Deep Insights with Mining Review Africa | Mining Review Africa | |
| 88 | 40 |  | Daniel and Jorge Explain the Universe | iHeartPodcasts | |
| 89 | 40 |  | KDIGO Conversations in Nephrology | KDIGO Communications | |
| 90 | 37 |  | Speaking of Psychology | American Psychological Association | |
| 91 | — |  | The Supermassive Podcast | The Royal Astronomical Society | |
| 92 | 19 |  | Theories of Everything with Curt Jaimungal | Theories of Everything | |
| 93 | 37 |  | The Energy Podcast | Shell | |
| 94 | 14 |  | The Origins Podcast with Lawrence Krauss | Lawrence M. Krauss | |
| 95 | 40 |  | Ask the Naked Scientists | Dr Chris Smith | |
| 96 | 17 | S | Students of Surgery | Martin Brand | |
| 97 | 30 |  | The Michael Shermer Show | Michael Shermer | |
| 98 | 10 |  | The Wild with Chris Morgan | KUOW News and Information | |
| 99 | 17 |  | The Psychology Podcast | iHeartPodcasts | |
| 100 | 65 |  | Radiowissen | Bayerischer Rundfunk | |
