| 1 | — |  | Curious Cases | BBC Radio 4 | |
| 2 | — |  | Hidden Brain | Hidden Brain, Shankar Vedantam | |
| 3 | 2 |  | The Infinite Monkey Cage | BBC Radio 4 | |
| 4 | 3 | F | Futureproof with Jonathan McCrea | Newstalk | |
| 5 | 1 |  | Science Weekly | The Guardian | |
| 6 | 32 |  | Making Sense with Sam Harris | Sam Harris | |
| 7 | 3 |  | Radiolab | WNYC Studios | |
| 8 | 2 | S | Show Me the Science with Luke O'Neill | Newstalk | |
| 9 | 6 |  | More or Less | BBC Radio 4 | |
| 10 | 20 | W | Why? with Emma Kennedy | Podmasters | |
| 11 | 9 |  | Science Vs | Spotify Studios | |
| 12 | 4 | M | Mooney Goes Wild | RTÉ Radio 1 | |
| 13 | 12 |  | Drilled | Pushkin Industries | |
| 14 | 4 |  | Ologies with Alie Ward | Alie Ward | |
| 15 | — |  | StarTalk Radio | Neil deGrasse Tyson | |
| 16 | 7 |  | All In The Mind | ABC | |
| 17 | 3 |  | Sean Carroll's Mindscape: Science, Society, Philosophy, Culture, Arts, and Ideas | Sean Carroll | |
| 18 | 10 |  | The Supermassive Podcast | The Royal Astronomical Society | |
| 19 | 52 |  | Why Do We Do That? | BBC Radio 4 | |
| 20 | 8 |  | CrowdScience | BBC World Service | |
| 21 | 10 |  | Future Ecologies | Future Ecologies | |
| 22 | 9 | B | Bird Songs with Seán Ronayne | RTÉ lyric fm | |
| 23 | 92 |  | Physics World Weekly Podcast | Physics World | |
| 24 | 7 | B | Boring History for Sleep | Velvet | |
| 25 | 9 | N | Naturefile | RTÉ lyric fm | |
| 26 | 118 |  | The Wild with Chris Morgan | KUOW News and Information | |
| 27 | 127 |  | Theories of Everything with Curt Jaimungal | Theories of Everything | |
| 28 | 155 |  | Planetary Radio: Space Exploration, Astronomy and Science | The Planetary Society | |
| 29 | — |  | Manifold | Steve Hsu | |
| 30 | — | P | Psychology | Yale School of Medicine | |
| 31 | — | P | Psychology - Video | Paul Bloom | |
| 32 | — | T | The Northstar Method | Northstar Performance Psychology | |
| 33 | — | D | DermConsult | ReachMD | |
| 34 | 7 |  | That UFO Podcast | That UFO Podcast | |
| 35 | 16 |  | Science In Action | BBC World Service | |
| 36 | 15 | F | Farming Today | BBC Radio 4 | |
| 37 | 11 |  | The world, the universe and us | New Scientist | |
| 38 | 36 |  | EverydaySpy Podcast | Andrew Bustamante | |
| 39 | 17 |  | Uncharted with Hannah Fry | BBC Radio 4 | |
| 40 | 16 |  | The Skeptics' Guide to the Universe | Dr. Steven Novella | |
| 41 | 43 |  | People Who Read People: A Behavior and Psychology Podcast | Zachary Elwood | |
| 42 | 13 |  | Astrum Space | Astrum | |
| 43 | 8 |  | Discovery | BBC World Service | |
| 44 | 143 |  | The End Of The World with Josh Clark | iHeartPodcasts | |
| 45 | 22 |  | NASA's Curious Universe | National Aeronautics and Space Administration (NASA) | |
| 46 | 13 | T | The Human Risk Podcast | Human Risk | |
| 47 | 11 |  | Unexplainable | Vox | |
| 48 | — |  | The Joy of Why | Steven Strogatz, Janna Levin and Quanta Magazine | |
| 49 | 15 |  | The Cartesian Cafe | Timothy Nguyen | |
| 50 | 134 |  | Rewilding the World with Ben Goldsmith | Ben Goldsmith | |
| 51 | 20 |  | Where Is My Mind? | Mark Gober and Blue Duck Media | |
| 52 | 13 |  | Daniel and Kelly’s Extraordinary Universe | iHeartPodcasts | |
| 53 | — |  | Invisibilia | NPR | |
| 54 | — | L | LIMIT | LIMIT | |
| 55 | 23 |  | Completely Arbortrary | Completely Arbortrary | |
| 56 | — | R | Reading Meetings with Mark and Molly | Molly Farry-Thorn | |
| 57 | — | S | Stroke Alert | Negar Asdaghi, MD, MSc, FRCPC, FAHA | |
| 58 | — |  | The Green Room: A Podcast from Obstetrics & Gynecology | Obstetrics & Gynecology (Green Journal) | |
| 59 | — |  | Skeptiko – Science at the Tipping Point | Alex Tsakiris | |
| 60 | — | P | People doing Physics | Cavendish Laboratory | |
| 61 | 12 |  | The Life Scientific | BBC Radio 4 | |
| 62 | 75 |  | The Michael Shermer Show | Michael Shermer | |
| 63 | 26 |  | The Resetter Podcast with Dr. Mindy | Dr. Mindy Pelz | |
| 64 | 14 |  | The Naked Scientists Podcast | The Naked Scientists | |
| 65 | 11 |  | This Podcast Will Kill You | Exactly Right and iHeartPodcasts | |
| 66 | 26 |  | Speaking of Psychology | American Psychological Association | |
| 67 | 25 |  | The Best of Coast to Coast AM | iHeartPodcasts and Coast to Coast AM | |
| 68 | 27 |  | DarkHorse Podcast | Bret Weinstein & Heather Heying | |
| 69 | 26 | C | Converging Dialogues | Converging Dialogues | |
| 70 | 11 |  | Sasquatch Chronicles | Sasquatch Chronicles - Bigfoot Encounters | |
| 71 | 12 |  | BBC Inside Science | BBC Radio 4 | |
| 72 | 28 | V | VITA1001 Modern Pharma | Sue and Iris | |
| 73 | 28 | R | Resonance Rising : Healing with Energy and Alternative Medicine | Ben Dadbin | |
| 74 | 28 | B | Best Medicine | BBC Radio 4 | |
| 75 | 28 | L | Living Room Logic – Irish Science Podcast | Andrew McGovern and Aidan Long | |
| 76 | 28 | N | Naturmorgon | Sveriges Radio | |
| 77 | 25 |  | Naturebang | BBC Radio 4 | |
| 78 | 25 |  | The Climate Question | BBC World Service | |
| 79 | 28 |  | Overheard at National Geographic | National Geographic | |
| 80 | 25 |  | Science Friday | Science Friday and WNYC Studios | |
| 81 | 17 |  | Psychiatry & Psychotherapy Podcast | David Puder, M.D. | |
| 82 | 20 |  | The Plodcast | Our Media | |
| 83 | 4 |  | Short Wave | NPR | |
| 84 | 22 |  | Bigfoot and Beyond with Cliff and Bobo | Bigfoot and Beyond LLC | |
| 85 | 31 |  | Green Dreamer: Seeding change towards collective healing, sustainability, regeneration | kaméa chayne | |
| 86 | 11 |  | Universe Today Podcast | Fraser Cain | |
| 87 | 10 |  | Robinson's Podcast | Robinson Erhardt | |
| 88 | 33 |  | Brain Science with Ginger Campbell, MD: Neuroscience for Everyone | Ginger Campbell, MD | |
| 89 | 20 |  | Alive Again | iHeartPodcasts | |
| 90 | 98 |  | Ask the Naked Scientists | Dr Chris Smith | |
| 91 | 13 |  | Scotland Outdoors | BBC Radio Scotland | |
| 92 | 32 |  | Cool Worlds Podcast | coolworldslab | |
| 93 | 17 |  | Somewhere in the Skies | SpectreVision Radio | |
| 94 | 35 |  | Science Friction | ABC | |
| 95 | 32 | T | This Natural Life | BBC Radio 4 | |
| 96 | 38 |  | Robert Sapolsky | Father-Offspring Interviews | Robert Sapolsky | |
| 97 | 25 | N | New Scientist CultureLab | New Scientist | |
| 98 | 37 |  | The Weirdest Thing I Learned This Week | Popular Science | |
| 99 | 37 | T | The Self Careapist Therapist Podcast | Lorain Moorehead | |
| 100 | 34 | L | Leaving Cert Biology Revision | Mr G. O'Donovan | |
