| 1 | — |  | Ologies with Alie Ward | Alie Ward | |
| 2 | — |  | Hidden Brain | Hidden Brain, Shankar Vedantam | |
| 3 | 1 |  | Radiolab | WNYC Studios | |
| 4 | — |  | Quirks and Quarks | CBC | |
| 5 | 1 |  | The Rest Is Science | Goalhanger | |
| 6 | 1 |  | StarTalk Radio | Neil deGrasse Tyson | |
| 7 | 2 | W | White Coat, Black Art | CBC | |
| 8 | — |  | Unexplainable | Vox | |
| 9 | 1 |  | Science Vs | Spotify Studios | |
| 10 | 2 | B | Boring History for Sleep | Velvet | |
| 11 | 2 |  | Making Sense with Sam Harris | Sam Harris | |
| 12 | — |  | The Resetter Podcast with Dr. Mindy | Dr. Mindy Pelz | |
| 13 | 1 |  | Sasquatch Chronicles | Sasquatch Chronicles - Bigfoot Encounters | |
| 14 | 1 |  | The Infinite Monkey Cage | BBC Radio 4 | |
| 15 | — |  | Tooth & Claw: True Stories of Animal Attacks | Wes Larson, Jeff Larson, Mike Smith | Daylight Media | |
| 16 | — |  | Sean Carroll's Mindscape: Science, Society, Philosophy, Culture, Arts, and Ideas | Sean Carroll | |
| 17 | 3 |  | This Podcast Will Kill You | Exactly Right and iHeartPodcasts | |
| 18 | 2 |  | Short Wave | NPR | |
| 19 | 1 |  | Curious Cases | BBC Radio 4 | |
| 20 | 7 |  | The Skeptics' Guide to the Universe | Dr. Steven Novella | |
| 21 | — |  | More or Less | BBC Radio 4 | |
| 22 | 8 |  | Your Brain On | Drs. Ayesha and Dean Sherzai | |
| 23 | 6 |  | Science Friday | Science Friday and WNYC Studios | |
| 24 | 3 |  | Leaked | TFLabs | |
| 25 | 3 |  | WEAPONIZED with Jeremy Corbell & George Knapp | Jeremy Corbell and George Knapp | |
| 26 | 3 |  | Blurry Creatures | Blurry Creatures | |
| 27 | 6 |  | BBC Inside Science | BBC Radio 4 | |
| 28 | 2 |  | Okay, But... Birds | Dr. Scott Taylor | |
| 29 | 3 |  | Planet Em | Emily McDonald | |
| 30 | 8 |  | The Science of Happiness | PRX and Greater Good Science Center | |
| 31 | 1 |  | Speaking of Psychology | American Psychological Association | |
| 32 | 10 |  | Something You Should Know | Mike Carruthers | OmniCast Media | |
| 33 | 14 |  | The Psychology Podcast | iHeartPodcasts | |
| 34 | 14 |  | DarkHorse Podcast | Bret Weinstein & Heather Heying | |
| 35 | 6 |  | The Nature Of with Willow Defebaugh | Atmos | |
| 36 | 9 |  | Daniel and Kelly’s Extraordinary Universe | iHeartPodcasts | |
| 37 | 12 |  | Overheard at National Geographic | National Geographic | |
| 38 | 10 |  | The Michael Shermer Show | Michael Shermer | |
| 39 | 30 |  | Discovery | BBC World Service | |
| 40 | 14 |  | Universe Today Podcast | Fraser Cain | |
| 41 | 8 |  | All In The Mind | ABC | |
| 42 | 5 |  | The Best of Coast to Coast AM | iHeartPodcasts and Coast to Coast AM | |
| 43 | 1 |  | The Wild with Chris Morgan | KUOW News and Information | |
| 44 | 3 |  | Bite Back with Abbey Sharp | Abbey Sharp / Frequency Podcast Network | |
| 45 | 13 |  | Astrum Space | Astrum | |
| 46 | 12 |  | The Warblers by Birds Canada | Birds Canada | |
| 47 | 10 |  | Sidenote by AsapSCIENCE | AsapSCIENCE | |
| 48 | 14 |  | Crash Course Pods: The Universe | Crash Course Pods, Complexly | |
| 49 | 11 |  | Stuff To Blow Your Mind | iHeartPodcasts | |
| 50 | 6 |  | Science Weekly | The Guardian | |
| 51 | 13 |  | Operation Night Cat | New Hampshire Public Radio | |
| 52 | 10 |  | Babbage from The Economist | The Economist | |
| 53 | 1 |  | La Science, CQFD | France Culture | |
| 54 | 2 |  | Psychiatry & Psychotherapy Podcast | David Puder, M.D. | |
| 55 | 14 |  | You Are Not So Smart | You Are Not So Smart | |
| 56 | 1 |  | TheThinkingAtheist | The Thinking Atheist | |
| 57 | 9 |  | UAP Unidentified Alien Podcast | Gamut Podcast Network | |
| 58 | 9 |  | The Great Simplification with Nate Hagens | Nate Hagens | |
| 59 | 24 |  | The Threshold | Foreign Policy | |
| 60 | 10 |  | Bigfoot Society | Jeremiah Byron | |
| 61 | 10 |  | Proxy with Yowei Shaw | Y3 Productions | |
| 62 | 17 |  | Instant Genius | Our Media | |
| 63 | 11 |  | Mysterious Radio: Paranormal, UFO and Lore Interviews | Podcast Audio House | |
| 64 | 3 |  | Therapist Uncensored Podcast | Sue Marriott LCSW, CGP & Ann Kelley PhD | |
| 65 | 2 | L | Les années lumière | Radio-Canada | |
| 66 | 24 |  | EverydaySpy Podcast | Andrew Bustamante | |
| 67 | 21 |  | La Conversation scientifique | France Culture | |
| 68 | 20 |  | People Who Read People: A Behavior and Psychology Podcast | Zachary Elwood | |
| 69 | 7 |  | NASA's Curious Universe | National Aeronautics and Space Administration (NASA) | |
| 70 | 18 |  | Google DeepMind: The Podcast | Hannah Fry | |
| 71 | 128 | L | Les voies métaboliques | Société québécoise de lipidologie, de nutrition et de métabolisme (SQLNM) | |
| 72 | 14 |  | Ask a Spaceman! | Paul M. Sutter | |
| 73 | 24 |  | The Astrophysics Podcast | Paul Duffell | |
| 74 | 13 |  | Astronomy Cast | Fraser Cain and Dr. Pamela Gay | |
| 75 | 17 |  | This Week in Virology | Vincent Racaniello | |
| 76 | 5 |  | The Quanta Podcast | Quanta Magazine | |
| 77 | 4 |  | Let's Learn Everything! | Maximum Fun | |
| 78 | 26 |  | Skeptoid | Brian Dunning | |
| 79 | 34 |  | Stanford Psychology Podcast | Stanford Psychology | |
| 80 | — |  | A Question of Science | The Francis Crick Institute | |
| 81 | 15 |  | Inner Cosmos with David Eagleman | iHeartPodcasts | |
| 82 | 23 |  | Nature Podcast | Springer Nature Limited | |
| 83 | 32 |  | Unexpected Elements | BBC World Service | |
| 84 | — |  | Why This Universe? | Dan Hooper, Shalma Wegsman | |
| 85 | 19 |  | Outrage + Optimism: The Climate Podcast | Persephonica and Global Optimism | |
| 86 | 29 |  | The Science of Birds | Ivan Phillipsen | |
| 87 | 52 | C | Choses à Savoir SCIENCES | Choses à Savoir | |
| 88 | 34 |  | Choiceology with Katy Milkman | Charles Schwab | |
| 89 | — |  | SpaceTime with Stuart Gary | Stuart Gary | |
| 90 | 15 |  | CrowdScience | BBC World Service | |
| 91 | 8 |  | Mythfits | Pionaire Podcasting | |
| 92 | 15 |  | The Marginal Revolution Podcast | Mercatus Center at George Mason University | |
| 93 | 9 | N | New Books in Political Science | New Books Network | |
| 94 | 14 |  | Accidental Gods | Accidental Gods | |
| 95 | 37 |  | The Weirdest Thing I Learned This Week | Popular Science | |
| 96 | 30 |  | The Common Descent Podcast | Common Descent | |
| 97 | 22 |  | Scotland Outdoors | BBC Radio Scotland | |
| 98 | 7 |  | BrainStuff | iHeartPodcasts | |
| 99 | 3 |  | Big Picture Science | Big Picture Science | |
| 100 | 10 |  | Wild Times: Wildlife Education | Wildlife Educator - Forrest Galante | |
