| 1 | — |  | Curious Cases | BBC Radio 4 | |
| 2 | 4 |  | Radiolab | WNYC Studios | |
| 3 | 1 |  | Ologies with Alie Ward | Alie Ward | |
| 4 | 1 |  | The Infinite Monkey Cage | BBC Radio 4 | |
| 5 | 2 |  | Hidden Brain | Hidden Brain, Shankar Vedantam | |
| 6 | 3 |  | More or Less | BBC Radio 4 | |
| 7 | 7 |  | Science Vs | Spotify Studios | |
| 8 | 4 |  | StarTalk Radio | Neil deGrasse Tyson | |
| 9 | 2 |  | All In The Mind | ABC | |
| 10 | 6 |  | The Skeptics' Guide to the Universe | Dr. Steven Novella | |
| 11 | 1 |  | Science Weekly | The Guardian | |
| 12 | 4 |  | Uncharted with Hannah Fry | BBC Radio 4 | |
| 13 | — |  | Making Sense with Sam Harris | Sam Harris | |
| 14 | 5 |  | Science Friction | ABC | |
| 15 | 5 |  | BBC Inside Science | BBC Radio 4 | |
| 16 | 3 |  | CrowdScience | BBC World Service | |
| 17 | 1 | B | Boring History for Sleep | Velvet | |
| 18 | 27 |  | The Great Simplification with Nate Hagens | Nate Hagens | |
| 19 | 6 |  | Science In Action | BBC World Service | |
| 20 | 26 | O | Our Changing World | RNZ | |
| 21 | 1 |  | Scotland Outdoors | BBC Radio Scotland | |
| 22 | 5 |  | Unexplainable | Vox | |
| 23 | 11 |  | Google DeepMind: The Podcast | Hannah Fry | |
| 24 | 3 |  | The world, the universe and us | New Scientist | |
| 25 | 10 |  | The Nature Of with Willow Defebaugh | Atmos | |
| 26 | 10 |  | The Psychology Podcast | iHeartPodcasts | |
| 27 | 31 |  | Psychiatry & Psychotherapy Podcast | David Puder, M.D. | |
| 28 | — |  | Alive Again | iHeartPodcasts | |
| 29 | 7 |  | Unexpected Elements | BBC World Service | |
| 30 | 6 |  | Daniel and Kelly’s Extraordinary Universe | iHeartPodcasts | |
| 31 | 5 |  | This Podcast Will Kill You | Exactly Right and iHeartPodcasts | |
| 32 | 12 |  | Science Magazine Podcast | Science Magazine | |
| 33 | 16 |  | UAP Unidentified Alien Podcast | Gamut Podcast Network | |
| 34 | 11 |  | Universe Today Podcast | Fraser Cain | |
| 35 | 26 |  | The Science of Happiness | PRX and Greater Good Science Center | |
| 36 | — | P | Planet A - Talks on Climate Change | Danish Ministry of Climate, Energy and Utilities | |
| 37 | 5 |  | DarkHorse Podcast | Bret Weinstein & Heather Heying | |
| 38 | 5 |  | The Naked Scientists Podcast | The Naked Scientists | |
| 39 | 76 |  | Rare Earth | BBC Radio 4 | |
| 40 | 80 |  | Science & Futurism with Isaac Arthur | Isaac Arthur | |
| 41 | 11 |  | The Science Show | ABC | |
| 42 | 13 |  | Taboo Science | Ashley Hamer Pritchard | |
| 43 | 12 | G | Goodfellow Unit | The Goodfellow Unit (University of Auckland) | |
| 44 | 57 |  | Reinvent Yourself with Dr. Tara | Dr. Tara Swart Bieber | |
| 45 | 18 | D | DOC Sounds of Science Podcast | Department of Conservation | |
| 46 | 8 |  | Sean Carroll's Mindscape: Science, Society, Philosophy, Culture, Arts, and Ideas | Sean Carroll | |
| 47 | 3 |  | Nature Podcast | Springer Nature Limited | |
| 48 | 108 |  | That UFO Podcast | That UFO Podcast | |
| 49 | 132 |  | Get Out Alive | Ashley Bray | |
| 50 | — | B | Breakthrough Broadcast | Drew Reck | |
| 51 | 141 |  | Theories of Everything with Curt Jaimungal | Theories of Everything | |
| 52 | 139 |  | Into the Impossible With Brian Keating | Big Bang Productions Inc. | |
| 53 | 7 |  | The Jim Rutt Show | The Jim Rutt Show | |
| 54 | — | W | Wild Tales | Nature Podcast | National Trust | |
| 55 | — |  | UAP Files Podcast | UAP Files Podcast | |
| 56 | — | O | Océanos de Ciencia - Cienciaes.com | cienciaes.com | |
| 57 | 5 |  | Discovery | BBC World Service | |
| 58 | — |  | World’s Wildest: Tales of Earth’s Most Extreme Creatures | Maya Higa & Connor O'Brien | |
| 59 | — |  | Quarks Daily | Quarks | |
| 60 | 18 |  | Tooth & Claw: True Stories of Animal Attacks | Wes Larson, Jeff Larson, Mike Smith | Daylight Media | |
| 61 | — | R | Rebel Economics with Dr. Steve Keen | Dr. Steve Keen | |
| 62 | — |  | Green Cover Podcast | Keith Berns | |
| 63 | — |  | Biosphere 2 Podcast | Aaron Bugaj | |
| 64 | 11 |  | Dr Karl Podcast | triplej | |
| 65 | 6 |  | The Resetter Podcast with Dr. Mindy | Dr. Mindy Pelz | |
| 66 | 18 | O | Open Country | BBC Radio 4 | |
| 67 | 26 |  | The Climate Question | BBC World Service | |
| 68 | 31 |  | The Origins Podcast with Lawrence Krauss | Lawrence M. Krauss | |
| 69 | 26 |  | Sasquatch Chronicles | Sasquatch Chronicles - Bigfoot Encounters | |
| 70 | 11 |  | The Life Scientific | BBC Radio 4 | |
| 71 | 36 | N | New Scientist Weekly | New Scientist | |
| 72 | 7 |  | Astrum Space | Astrum | |
| 73 | 25 |  | Head Shepherd | Mark Ferguson | |
| 74 | 35 |  | The Astrophysics Podcast | Paul Duffell | |
| 75 | 32 | T | The Seed Pod. | Sian Crowley | |
| 76 | 36 |  | Physics World Weekly Podcast | Physics World | |
| 77 | 15 |  | Robert Sapolsky | Father-Offspring Interviews | Robert Sapolsky | |
| 78 | 31 |  | Skeptics with a K | Skeptic Media Limited | |
| 79 | 25 |  | Invisibilia | NPR | |
| 80 | 25 |  | The Sociology of Everything Podcast | Eric Hsu & Louis Everuss (Lou & the Hsu) | |
| 81 | 24 |  | The Science of Birds | Ivan Phillipsen | |
| 82 | 26 |  | Overheard at National Geographic | National Geographic | |
| 83 | 67 |  | Ask a Spaceman! | Paul M. Sutter | |
| 84 | 29 | C | Chris Skinner's Countryside Podcasts | High Ash Farm | |
| 85 | 61 |  | This Week in Virology | Vincent Racaniello | |
| 86 | 23 | T | Talking of Science | Helen | |
| 87 | 10 |  | Stuff To Blow Your Mind | iHeartPodcasts | |
| 88 | 19 |  | Biotech Hangout | Daphne Zohar, Josh Schimmer, Brad Loncar, Tim Opler & more | |
| 89 | 25 |  | BioCentury This Week | BioCentury | |
| 90 | 20 | N | New Books in Language | Marshall Poe | |
| 91 | 69 |  | The Common Descent Podcast | Common Descent | |
| 92 | 24 |  | In Defense of Plants Podcast | In Defense of Plants | |
| 93 | 18 | E | EM Weekly Podcast | The Readiness Lab | |
| 94 | 18 |  | THE CLUB OF ROME PODCAST | The Club of Rome | |
| 95 | 44 |  | Science Friday | Science Friday and WNYC Studios | |
| 96 | 29 |  | The Michael Shermer Show | Michael Shermer | |
| 97 | 30 | B | BJA Education Podcasts | BJA Education | |
| 98 | 32 |  | Os três elementos | Os três elementos / TocaCast | |
| 99 | 34 |  | Let's Talk Chemistry- a science podcast by ChemTalk | The ChemTalk Team | |
| 100 | 27 | E | Exploring Astrophysics | Vikram Bhamre | |
