| 1 | — |  | Hidden Brain | Hidden Brain, Shankar Vedantam | |
| 2 | — |  | The Infinite Monkey Cage | BBC Radio 4 | |
| 2 | 1 | F | Futureproof with Jonathan McCrea | Newstalk | |
| 3 | — |  | Radiolab | WNYC Studios | |
| 5 | 1 |  | Curious Cases | BBC Radio 4 | |
| 5 | — |  | More or Less | BBC Radio 4 | |
| 6 | 1 | S | Show Me the Science with Luke O'Neill | Newstalk | |
| 7 | 1 | C | CountryWide | RTÉ Radio 1 | |
| 7 | 3 |  | Science Weekly | The Guardian | |
| 7 | 1 |  | CrowdScience | BBC World Service | |
| 10 | — |  | StarTalk Radio | Neil deGrasse Tyson | |
| 11 | 2 | B | Boring History for Sleep | Velvet | |
| 11 | 156 |  | New Books in Critical Theory | Marshall Poe | |
| 12 | 4 | M | Mooney Goes Wild | RTÉ Radio 1 | |
| 13 | 2 |  | The world, the universe and us | New Scientist | |
| 13 | — | M | Making Science with Tom Whipple | The Times | |
| 13 | 21 | N | Naturefile | RTÉ lyric fm | |
| 13 | 4 | B | Bird Songs with Seán Ronayne | RTÉ lyric fm | |
| 14 | 4 |  | Making Sense with Sam Harris | Sam Harris | |
| 14 | 5 |  | Science Vs | Spotify Studios | |
| 15 | 8 |  | The Common Descent Podcast | Common Descent | |
| 15 | — |  | BBC Inside Science | BBC Radio 4 | |
| 16 | 46 |  | Theories of Everything with Curt Jaimungal | Theories of Everything | |
| 16 | 14 |  | Psychiatry & Psychotherapy Podcast | David Puder, M.D. | |
| 17 | 25 | I | In Your Nature | By BirdWatch Ireland | |
| 17 | 29 | N | New Scientist Weekly | New Scientist | |
| 18 | 4 |  | Discovery | BBC World Service | |
| 18 | 5 |  | Mysterious Universe | 8th Kind | |
| 19 | 47 |  | Speaking of Psychology | American Psychological Association | |
| 20 | 90 |  | Scotland Outdoors | BBC Radio Scotland | |
| 20 | 3 |  | Outside/In | NHPR | |
| 20 | 9 |  | Google DeepMind: The Podcast | Hannah Fry | |
| 21 | 4 |  | The Climate Question | BBC World Service | |
| 22 | 10 |  | Unexpected Elements | BBC World Service | |
| 22 | 11 |  | I Know Dino: The Big Dinosaur Podcast | I KNOW DINO, LLC | |
| 23 | — | O | Open Country | BBC Radio 4 | |
| 23 | 41 |  | EverydaySpy Podcast | Andrew Bustamante | |
| 24 | 2 |  | Ologies with Alie Ward | Alie Ward | |
| 26 | 49 |  | Ask MIT Climate | MIT Climate Project | |
| 27 | 11 |  | Science In Action | BBC World Service | |
| 28 | 109 |  | Short Wave | NPR | |
| 28 | 125 |  | Paleo Nerds | paleonerds | |
| 29 | 6 |  | Sasquatch Chronicles | Sasquatch Chronicles - Bigfoot Encounters | |
| 30 | 3 |  | The Skeptics' Guide to the Universe | Dr. Steven Novella | |
| 31 | — | F | Fossil Huntress — Palaeo Sommelier | Fossil Huntress | |
| 31 | 7 | I | ImmunoTea: Your Immunology Podcast | Lara Dungan | |
| 32 | 168 |  | Outrage + Optimism: The Climate Podcast | Persephonica and Global Optimism | |
| 32 | 155 | T | The Function Room | GoLoud | |
| 33 | 4 |  | DarkHorse Podcast | Bret Weinstein & Heather Heying | |
| 33 | 61 |  | Stanford Psychology Podcast | Stanford Psychology | |
| 33 | — |  | Safety Third | Safety Third | |
| 34 | 12 |  | Ask a Spaceman! | Paul M. Sutter | |
| 35 | 74 |  | The Joy of Why | Steven Strogatz, Janna Levin and Quanta Magazine | |
| 35 | 10 |  | Astrum Space | Astrum | |
| 35 | — |  | Most Terrifying Places in America | Travel Channel | |
| 36 | 8 |  | Houston We Have a Podcast | National Aeronautics and Space Administration (NASA) | |
| 37 | — | P | Palaeocast | Palaeocast | |
| 37 | 6 |  | Ground Truths | Eric Topol | |
| 38 | — | E | Energy Reads | MIT Energy Initiative | |
| 38 | — |  | Alive Again | iHeartPodcasts | |
| 38 | — |  | The History of Chemistry | Steve Cohen | |
| 39 | 7 |  | Flow Radio | Flow Research Collective | |
| 40 | 6 |  | The Ocean Age | Fed DeGobbi | |
| 40 | 4 |  | Total Disclosure Podcast | Tyler Roberts | |
| 42 | 7 |  | Geopop - Le Scienze nella vita di tutti i giorni | Geopop | |
| 43 | 3 | N | Naked Neuroscience, from the Naked Scientists | James Tytko | |
| 44 | — |  | Great Mysteries of Physics | The Conversation | |
| 44 | 13 |  | This Podcast Will Kill You | Exactly Right and iHeartPodcasts | |
| 45 | 8 |  | TED Talks Science and Medicine | TED | |
| 46 | 6 |  | Sean Carroll's Mindscape: Science, Society, Philosophy, Culture, Arts, and Ideas | Sean Carroll | |
| 46 | — |  | Ciência Suja | Ciência Suja | |
| 46 | 7 |  | iNTO THE FRAY RADIO - Encounters with the Paranormal | Shannon LeGro | |
| 47 | — | T | The Met Éireann Podcast | Met Éireann | |
| 47 | 6 |  | This Week in Neuroscience | Vincent Racaniello | |
| 48 | 24 | T | The Decision Corner | The Decision Lab | |
| 49 | 14 |  | Into the Impossible With Brian Keating | Big Bang Productions Inc. | |
| 50 | 21 |  | WEAPONIZED with Jeremy Corbell & George Knapp | Jeremy Corbell and George Knapp | |
| 51 | 27 |  | Robinson's Podcast | Robinson Erhardt | |
| 54 | 27 |  | ScienceStuff | iHeartPodcasts | |
| 55 | 29 |  | Skeptics with a K | Skeptic Media Limited | |
| 56 | 20 |  | Ancient Aliens | PodcastOne | |
| 56 | 34 |  | That UFO Podcast | That UFO Podcast | |
| 58 | 28 | C | Cows and Effect | Paul Allison and Michael Blanche | |
| 61 | 26 |  | The Grave Talks | Haunted, Paranormal & Supernatural | Ghost Stores, Haunted, Paranormal & Supernatural Stories | |
| 62 | 21 |  | You Are Not So Smart | You Are Not So Smart | |
| 63 | 9 |  | The Resetter Podcast with Dr. Mindy | Dr. Mindy Pelz | |
| 65 | 18 | C | Conservation and Science | Tommy's Outdoors | |
| 66 | 32 | T | The Human Subject | BBC Radio 4 | |
| 67 | 27 |  | Paranormal Mysteries | Nic Ryan | Paranormal Mysteries Podcast | |
| 68 | 2 |  | All In The Mind | ABC | |
| 68 | 29 |  | NASA's Curious Universe | National Aeronautics and Space Administration (NASA) | |
| 70 | 22 |  | Unexplainable | Vox | |
| 71 | 22 | L | Love The Bees Podcast | Yvonne Johnston | |
| 73 | 26 | M | Mysteries of the Universe | TheTuringApp.Com | |
| 73 | 30 | R | Richard Wiseman's On Your Mind | Podimo & TellTale | |
| 75 | 4 |  | The Life Scientific | BBC Radio 4 | |
| 76 | 32 |  | Os três elementos | Os três elementos / TocaCast | |
| 77 | 32 | W | Where Two Deserts Meet | National Park Service | |
| 78 | 32 | N | New Scientist Escape Pod | New Scientist | |
| 78 | 8 |  | Universe Today Podcast | Fraser Cain | |
