| 1 | 9 |  | Making Sense with Sam Harris | Sam Harris | |
| 2 | 1 |  | Radiolab | WNYC Studios | |
| 3 | 6 |  | The Infinite Monkey Cage | BBC Radio 4 | |
| 4 | 2 |  | Curious Cases | BBC Radio 4 | |
| 5 | 7 |  | Science Vs | Spotify Studios | |
| 6 | 1 |  | Science Weekly | The Guardian | |
| 7 | 4 |  | Uncharted with Hannah Fry | BBC Radio 4 | |
| 8 | 6 |  | More or Less | BBC Radio 4 | |
| 9 | 2 |  | Psychiatry & Psychotherapy Podcast | David Puder, M.D. | |
| 10 | 3 |  | Drilled | Pushkin Industries | |
| 11 | 7 |  | Ologies with Alie Ward | Alie Ward | |
| 12 | 63 |  | CrowdScience | BBC World Service | |
| 13 | 11 |  | ScienceStuff | iHeartPodcasts | |
| 14 | 7 | B | Bird Songs with Seán Ronayne | RTÉ lyric fm | |
| 15 | — | P | Physics World Stories Podcast | Physics World | |
| 16 | 8 | N | New Scientist Weekly | New Scientist | |
| 17 | 10 |  | The Climate Question | BBC World Service | |
| 18 | 1 |  | Hidden Brain | Hidden Brain, Shankar Vedantam | |
| 19 | 5 | S | Show Me the Science with Luke O'Neill | Newstalk | |
| 20 | 2 |  | BBC Inside Science | BBC Radio 4 | |
| 21 | 37 | C | COACH+ The Art & Science of Positive Psychology Coaching 3 | Dr Suzy Green | |
| 22 | 7 |  | Sean Carroll's Mindscape: Science, Society, Philosophy, Culture, Arts, and Ideas | Sean Carroll | |
| 23 | 55 |  | NASA's Curious Universe | National Aeronautics and Space Administration (NASA) | |
| 24 | 7 |  | Robinson's Podcast | Robinson Erhardt | |
| 25 | 9 |  | Overheard at National Geographic | National Geographic | |
| 26 | 78 | I | In Your Nature | By BirdWatch Ireland | |
| 27 | 9 |  | This Podcast Will Kill You | Exactly Right and iHeartPodcasts | |
| 28 | 94 |  | Crash Course Pods: The Universe | Crash Course Pods, Complexly | |
| 29 | 9 |  | The Resetter Podcast with Dr. Mindy | Dr. Mindy Pelz | |
| 30 | — |  | Grey Dynamics | Grey Dynamics | |
| 31 | — |  | Real Ghost Stories Online | Real Ghost Stories Online | Paranormal, Supernatural & Horror Radio | |
| 32 | — | E | Economics In Ten | Economics In Ten | |
| 33 | — |  | Stanford Psychology Podcast | Stanford Psychology | |
| 34 | — |  | Dr. Chapa’s OBGYN Clinical Pearls | Dr. Chapa’s Clinical Pearls | |
| 35 | — | T | The International Security Podcast | International Security | |
| 36 | — | T | Talking Euretina | Whipsmart Media | |
| 37 | — | T | TriloTalk | Trilogy Writing & Consulting | |
| 38 | — | J | Joy in Academia | Joy in Academia | |
| 39 | 12 |  | DarkHorse Podcast | Bret Weinstein & Heather Heying | |
| 40 | 6 |  | StarTalk Radio | Neil deGrasse Tyson | |
| 41 | 52 |  | The Skeptics' Guide to the Universe | Dr. Steven Novella | |
| 42 | 17 |  | Unexplainable | Vox | |
| 43 | 15 | M | Mooney Goes Wild | RTÉ Radio 1 | |
| 44 | 7 | F | Futureproof with Jonathan McCrea | Newstalk | |
| 45 | 16 |  | Stuff To Blow Your Mind | iHeartPodcasts | |
| 46 | 23 |  | Great Mysteries of Physics | The Conversation | |
| 47 | 21 | E | Equine Med On The Go | Sacha Brévault et Angélique Hayot | |
| 48 | 3 |  | The Supermassive Podcast | The Royal Astronomical Society | |
| 49 | 1 |  | Sasquatch Chronicles | Sasquatch Chronicles - Bigfoot Encounters | |
| 50 | 4 |  | The Life Scientific | BBC Radio 4 | |
| 51 | 21 |  | Most Terrifying Places in America | Travel Channel | |
| 52 | 19 |  | Osterholm Update | CIDRAP | |
| 53 | 14 |  | Robert Sapolsky | Father-Offspring Interviews | Robert Sapolsky | |
| 54 | 22 |  | Oceans: Life Under Water | Crowd Network | Greenpeace UK | |
| 55 | 27 |  | Mysterious Universe | 8th Kind | |
| 56 | 25 | L | La Terre au carré | France Inter | |
| 57 | 22 | P | PALcast | Fabio de Sa e Silva | |
| 58 | 20 | I | Institute for European Environmental Policy (IEEP) | Institute for European Environmental Policy (IEEP) | |
| 59 | 22 | O | Outdoor Lives by Mike Raine | Mike Raine | |
| 60 | 24 |  | Invisibilia | NPR | |
| 61 | 21 |  | Naturebang | BBC Radio 4 | |
| 62 | 21 |  | Countercurrent: conversations with Professor Roger Kneebone | Professor Roger Kneebone | |
| 63 | 21 | م | مع تميم | Atheer ~ أثير | |
| 64 | 21 |  | BioVenture VoiCes with Chris Garabedian | BiotechTV | |
| 65 | 21 | B | BIOS | Alix Ventures | |
| 66 | 14 |  | Unexpected Elements | BBC World Service | |
| 67 | 19 |  | The Origins Podcast with Lawrence Krauss | Lawrence M. Krauss | |
| 68 | 21 |  | Speaking of Psychology | American Psychological Association | |
| 69 | 95 | C | CountryWide | RTÉ Radio 1 | |
| 70 | 21 | M | Mysteries of the Universe | TheTuringApp.Com | |
| 71 | 20 |  | The world, the universe and us | New Scientist | |
| 72 | 7 |  | Daniel and Kelly’s Extraordinary Universe | iHeartPodcasts | |
| 73 | 12 | N | Naturefile | RTÉ lyric fm | |
| 74 | 3 |  | Discovery | BBC World Service | |
| 75 | 21 |  | The Joy of Why | Steven Strogatz, Janna Levin and Quanta Magazine | |
| 76 | 20 |  | Short Wave | NPR | |
| 77 | 22 |  | The Nature Of with Willow Defebaugh | Atmos | |
| 78 | 25 |  | The Micah Hanks Program | Micah Hanks | |
| 79 | 1 |  | Science In Action | BBC World Service | |
| 80 | 22 |  | That UFO Podcast | That UFO Podcast | |
| 81 | 2 |  | Outrage + Optimism: The Climate Podcast | Persephonica and Global Optimism | |
| 82 | 23 | N | New Books in Public Policy | New Books Network | |
| 83 | 26 |  | Better Brain Fitness (a Brainjo Production) | Josh Turknett, MD | |
| 84 | 24 |  | On Humans | Ilari Mäkelä | |
| 85 | 23 | M | Maths on the Move | plus.maths.org | |
| 86 | 23 |  | Breaking Math Podcast | Autumn Phaneuf & Noah Giansiracusa | |
| 87 | 20 | C | Combinatoire - Timothy Gowers | Collège de France | |
| 88 | 24 | T | The Climate Change Hoax | Karl Michael | |
| 89 | 24 |  | Couched | Dr. Almas (Ally) Merchant, Dr. Billie Pivnick & Dr. Romy Reading, Produced by Hangar Studios, NYC | |
| 90 | 24 | T | The Math Club | Pete and Noah | |
| 91 | 17 | A | American Journal of Public Health Podcast | AJPH | |
| 92 | 24 |  | Slow Radio | BBC Radio 3 | |
| 93 | 24 | W | White Coat, Black Art | CBC | |
| 94 | 24 |  | Inflection Point | C&EN | |
| 95 | 24 | S | Soul Fire Holistics | Ivy Donovan | |
| 96 | 24 | N | Not So Angry Environmentalists | Urvari | |
| 97 | 24 | S | Sum of All Parts | ABC listen | |
| 98 | 22 |  | In Defense of Plants Podcast | In Defense of Plants | |
| 99 | 14 |  | The Great Simplification with Nate Hagens | Nate Hagens | |
| 100 | 51 |  | Scotland Outdoors | BBC Radio Scotland | |
