| 1 | — |  | Hidden Brain | Hidden Brain, Shankar Vedantam | |
| 2 | 3 |  | Ologies with Alie Ward | Alie Ward | |
| 3 | 3 |  | Radiolab | WNYC Studios | |
| 4 | 2 |  | The Infinite Monkey Cage | BBC Radio 4 | |
| 5 | 2 |  | Unexplainable | Vox | |
| 6 | 2 |  | StarTalk Radio | Neil deGrasse Tyson | |
| 7 | — |  | The Naked Scientists Podcast | The Naked Scientists | |
| 8 | — |  | Making Sense with Sam Harris | Sam Harris | |
| 9 | 1 |  | Science Vs | Spotify Studios | |
| 10 | 15 |  | The Skeptics' Guide to the Universe | Dr. Steven Novella | |
| 11 | 2 |  | The Resetter Podcast with Dr. Mindy | Dr. Mindy Pelz | |
| 12 | 45 |  | That UFO Podcast | That UFO Podcast | |
| 13 | 43 |  | Living Planet | DW | |
| 14 | 20 |  | Overheard at National Geographic | National Geographic | |
| 15 | — | M | Mathematics Simplified | Anjali Sharma | |
| 16 | 4 |  | Discovery | BBC World Service | |
| 17 | 36 |  | The world, the universe and us | New Scientist | |
| 18 | 4 |  | More or Less | BBC Radio 4 | |
| 19 | 63 |  | Curious Cases | BBC Radio 4 | |
| 20 | 4 | E | Ecological Adventures | UF/IFAS Department of Wildlife Ecology and Conservation | |
| 21 | 30 |  | Reinvent Yourself with Dr. Tara | Dr. Tara Swart Bieber | |
| 22 | 11 |  | The Psychology Podcast | iHeartPodcasts | |
| 23 | 13 | S | Students of Surgery | Martin Brand | |
| 24 | 6 |  | BBC Inside Science | BBC Radio 4 | |
| 25 | 10 |  | The Astrophysics Podcast | Paul Duffell | |
| 26 | — |  | Ask the Naked Scientists | Dr Chris Smith | |
| 27 | 8 |  | Something You Should Know | Mike Carruthers | OmniCast Media | |
| 28 | 120 |  | SpaceTime with Stuart Gary | Stuart Gary | |
| 29 | 11 |  | Sasquatch Chronicles | Sasquatch Chronicles - Bigfoot Encounters | |
| 30 | 17 |  | Great Mysteries of Physics | The Conversation | |
| 31 | 8 |  | Therapist Uncensored Podcast | Sue Marriott LCSW, CGP & Ann Kelley PhD | |
| 32 | 16 | F | Fundamentals of Mathematics | Eduardo Reyes | |
| 33 | — |  | Neuroscience: Amateur Hour | Neuroscience: Amateur Hour | |
| 34 | 17 |  | People Who Read People: A Behavior and Psychology Podcast | Zachary Elwood | |
| 35 | — |  | Rewilding the World with Ben Goldsmith | Ben Goldsmith | |
| 36 | — |  | The New Quantum Era - innovation in quantum computing, science and technology | Sebastian Hassinger | |
| 37 | 17 |  | CrowdScience | BBC World Service | |
| 38 | — |  | Curiosity Weekly | Discovery | |
| 39 | — | C | Clinically Thinking | Clinically Thinking | |
| 40 | 12 |  | Science Weekly | The Guardian | |
| 41 | — |  | The LIUniverse with Dr. Charles Liu | theliuniverse | |
| 42 | — |  | Daniel and Jorge Explain the Universe | iHeartPodcasts | |
| 43 | — |  | Unravelling the Universe℠ | Ben (host) and Harmonie (behind the scenes) | |
| 44 | — | T | The Alcohol 'Problem' Podcast | James Morris | |
| 45 | 68 |  | SciShow Tangents | Complexly | |
| 46 | 14 |  | HOLOSKY PODCAST | Holosky Podcast | |
| 47 | — |  | Lost Women of Science | Lost Women of Science | |
| 48 | — | R | Research Insights, a Society of Actuaries Podcast | Research Insights | |
| 49 | — |  | Strange and Unexplained | Cristina Gomez | |
| 50 | — |  | Naturebang | BBC Radio 4 | |
| 51 | 29 | E | Enneagram Type 1 | Joel Hubbard and Jim Zartman | |
| 52 | 29 | E | Enneagram Type 9 | Joel Hubbard and Jim Zartman | |
| 53 | — |  | The Geonomics Podcast | Dr Alex Dickinson | |
| 54 | — | L | Lost Cells | SWI swissinfo.ch | |
| 55 | — | N | NeuroFrontiers | Practical Neurology | |
| 56 | — |  | UCLA Housing Voice | UCLA Lewis Center for Regional Policy Studies | |
| 57 | 36 |  | The Casual Birder Podcast | Suzy Buttress | |
| 58 | 31 |  | Speed & Scale | TED | |
| 59 | 22 | A | Ask the Naked Scientists | Dr Chris Smith | |
| 60 | 31 |  | Emergency Medicine Board Bombs | EM Board Bombs | |
| 61 | 133 |  | All In The Mind | ABC | |
| 62 | 29 | T | The Best of Making Sense with Sam Harris | Sam Harris | |
| 63 | 5 |  | Mind & Life | Mind & Life Institute | |
| 64 | 33 |  | The Grave Talks | Haunted, Paranormal & Supernatural | Ghost Stores, Haunted, Paranormal & Supernatural Stories | |
| 65 | 11 |  | This Podcast Will Kill You | Exactly Right and iHeartPodcasts | |
| 66 | 23 |  | Stuff To Blow Your Mind | iHeartPodcasts | |
| 67 | 27 |  | Mysterious Universe | 8th Kind | |
| 68 | 5 |  | In Defense of Plants Podcast | In Defense of Plants | |
| 69 | — |  | Sean Carroll's Mindscape: Science, Society, Philosophy, Culture, Arts, and Ideas | Sean Carroll | |
| 70 | 33 |  | So Cultured Podcast | Liv Grant & Taz Shipley | |
| 71 | 19 |  | CREOGs Over Coffee | CREOGs Over Coffee | |
| 72 | 37 |  | Beat Your Genes Podcast | BeatYourGenes | |
| 73 | 22 | W | Wildest Kruger Stories | Karolina Norée | |
| 74 | 36 |  | Inner Cosmos with David Eagleman | iHeartPodcasts | |
| 75 | 30 | T | This Natural Life | BBC Radio 4 | |
| 76 | 17 |  | Science Magazine Podcast | Science Magazine | |
| 77 | 35 |  | Talk Nerdy with Cara Santa Maria | Cara Santa Maria | |
| 78 | 28 |  | Regenerative Agriculture Podcast | John Kempf | |
| 79 | 35 | T | The Belt and Road Podcast | Erik Myxter-iino, Juliet Lu and Keren Zhu - edited by Taili Ni | |
| 80 | 34 |  | Pocket Science | Fralin Biomedical Research Institute | |
| 81 | 34 | B | Building Green | Ladina Schöpf | |
| 82 | 34 | W | World Bank Group │ What Have We Learned? The Evaluation Podcast | World Bank Group / Independent Evaluation Group | |
| 83 | 34 | B | Believe: Paranormal & UFO Podcast | Kade Moir | |
| 84 | 24 |  | Science Friday | Science Friday and WNYC Studios | |
| 85 | 51 |  | Psychiatry & Psychotherapy Podcast | David Puder, M.D. | |
| 86 | 24 |  | DarkHorse Podcast | Bret Weinstein & Heather Heying | |
| 87 | — |  | Space Nuts: Astronomy Insights & Cosmic Discoveries | Professor Fred Watson and Andrew Dunkley | |
| 88 | 1 |  | Uncharted with Hannah Fry | BBC Radio 4 | |
| 89 | 28 |  | Theories of Everything with Curt Jaimungal | Theories of Everything | |
| 90 | 2 |  | Mysterious Radio: Paranormal, UFO and Lore Interviews | Podcast Audio House | |
| 91 | 41 |  | Paranormal Mysteries | Nic Ryan | Paranormal Mysteries Podcast | |
| 92 | 34 |  | Short Wave | NPR | |
| 93 | 31 |  | Sasquatch Odyssey | Sasquatch Odyssey-Bigfoot Encounters | |
| 94 | 57 |  | Science & Futurism with Isaac Arthur | Isaac Arthur | |
| 95 | 43 |  | The Great Simplification with Nate Hagens | Nate Hagens | |
| 96 | 24 |  | Your Brain On | Drs. Ayesha and Dean Sherzai | |
| 97 | 33 |  | Outrage + Optimism: The Climate Podcast | Persephonica and Global Optimism | |
| 98 | 4 |  | Why This Universe? | Dan Hooper, Shalma Wegsman | |
| 99 | — |  | Relebogile Mabotja hosts The Naked Scientist | Radio 702 | |
| 100 | 33 |  | The Michael Shermer Show | Michael Shermer | |
