| 1 | — |  | Curious Cases | BBC Radio 4 | |
| 2 | — |  | Instant Genius | Our Media | |
| 3 | 1 | W | Wild Tales | Nature Podcast | National Trust | |
| 4 | 1 |  | This Podcast Will Kill You | Exactly Right and iHeartPodcasts | |
| 5 | — |  | The Skeptics' Guide to the Universe | Dr. Steven Novella | |
| 6 | — |  | Crash Course Pods: The Universe | Crash Course Pods, Complexly | |
| 7 | 97 |  | Science Vs | Spotify Studios | |
| 8 | 2 |  | BBC Inside Science | BBC Radio 4 | |
| 9 | — |  | Discovery | BBC World Service | |
| 10 | 2 |  | Robinson's Podcast | Robinson Erhardt | |
| 11 | — |  | Skeptoid | Brian Dunning | |
| 12 | — |  | The End Of The World with Josh Clark | iHeartPodcasts | |
| 13 | 6 |  | Hidden Brain | Hidden Brain, Shankar Vedantam | |
| 14 | 1 |  | Making Sense with Sam Harris | Sam Harris | |
| 15 | 1 | T | The Best of Making Sense with Sam Harris | Sam Harris | |
| 16 | 1 |  | Psychiatry & Psychotherapy Podcast | David Puder, M.D. | |
| 17 | 1 |  | Radiolab | WNYC Studios | |
| 18 | 3 |  | Science Weekly | The Guardian | |
| 19 | 2 |  | Scotland Outdoors | BBC Radio Scotland | |
| 20 | 2 | B | Best of Natural History Radio | BBC Radio 4 | |
| 21 | 2 | T | The Natural History Podcast | James Mills | |
| 22 | 3 | V | Von Ráðgjöf - Lausnin Hlaðvarp | Von ráðgjöf - Lausnin hlaðvarp | |
| 23 | — |  | Unexplainable | Vox | |
| 24 | 98 |  | Daniel and Kelly’s Extraordinary Universe | iHeartPodcasts | |
| 25 | 42 |  | The Weirdest Thing I Learned This Week | Popular Science | |
| 26 | 6 |  | StarTalk Radio | Neil deGrasse Tyson | |
| 27 | — |  | The Wild with Chris Morgan | KUOW News and Information | |
| 28 | 106 |  | The Naked Scientists Podcast | The Naked Scientists | |
| 29 | 7 |  | The Infinite Monkey Cage | BBC Radio 4 | |
| 30 | 25 |  | Outrage + Optimism: The Climate Podcast | Persephonica and Global Optimism | |
| 31 | 17 |  | SciShow Tangents | Complexly | |
| 32 | 19 |  | Skeptics with a K | Skeptic Media Limited | |
| 33 | — | E | Exolore: facts-based fictional worldbuilding | Multitude | |
| 34 | 80 |  | Unexpected Elements | BBC World Service | |
| 35 | 96 |  | That's Absurd Please Elaborate | Trace Elements Media | |
| 36 | 134 |  | Podcast UFO | Martin Willis | |
| 37 | — |  | Manifold | Steve Hsu | |
| 38 | — | N | Naked Scientists, In Short Special Editions Podcast | The Naked Scientists | |
| 39 | 15 |  | Sean Carroll's Mindscape: Science, Society, Philosophy, Culture, Arts, and Ideas | Sean Carroll | |
| 40 | 12 |  | Ologies with Alie Ward | Alie Ward | |
| 41 | 14 | 2 | 24/7 | Beggi Ólafs | |
| 42 | 73 |  | The Supermassive Podcast | The Royal Astronomical Society | |
| 43 | 82 |  | Ask a Spaceman! | Paul M. Sutter | |
| 44 | 133 |  | NASA's Curious Universe | National Aeronautics and Space Administration (NASA) | |
| 45 | — | S | Stimulating Brains | Andreas Horn | |
| 46 | 4 |  | Total Disclosure Podcast | Tyler Roberts | |
| 47 | 21 |  | Nature Podcast | Springer Nature Limited | |
| 48 | 14 |  | Inner Cosmos with David Eagleman | iHeartPodcasts | |
| 49 | 16 |  | Safety Third | Safety Third | |
| 50 | — |  | Kosmographia | Randall Carlson | |
| 51 | 15 |  | Freakonomics, M.D. | Freakonomics Radio + Stitcher | |
| 52 | 23 |  | Speaking of Psychology | American Psychological Association | |
| 53 | 23 |  | DarkHorse Podcast | Bret Weinstein & Heather Heying | |
| 54 | 16 | W | Waterlands | Wildfowl & Wetlands Trust | |
| 55 | 117 |  | Das Wissen | SWR | SWR | |
| 56 | 6 |  | This Week in Virology | Vincent Racaniello | |
| 57 | 26 | M | Make Space For Nature | NatureScot | |
| 58 | 26 |  | MCHD Paramedic Podcast | Montgomery County Hospital District | |
| 59 | 40 | B | Bird Sounds | BirdSounds.com | |
| 60 | — |  | Main Engine Cut Off | Anthony Colangelo | |
| 61 | — |  | Bigfoot Eyewitness Radio | Vic Cundiff | |
| 62 | 8 |  | The Science of Birds | Ivan Phillipsen | |
| 63 | 28 |  | ABA Inside Track | ABA Inside Track | |
| 64 | 27 |  | Big Picture Science | Big Picture Science | |
| 65 | 26 |  | Vetenskapsradion | Sveriges Radio | |
| 66 | 26 |  | Astrum Space | Astrum | |
| 67 | 26 |  | The Couples Therapist Couch | Shane Birkel | |
| 68 | 26 | F | Fossils and Fiction | Travis Holland and Alyssa Fjeld. | |
| 69 | 26 |  | Science & Futurism with Isaac Arthur | Isaac Arthur | |
| 70 | 26 | S | Stanford Psychology Podcast | Stanford Psychology | |
| 71 | 2 |  | Invisibilia | NPR | |
| 72 | 27 |  | A Life More Wild | Canopy & Stars | |
| 73 | 27 |  | CrowdScience | BBC World Service | |
| 74 | 27 |  | Science In Action | BBC World Service | |
| 75 | 26 | V | Vetenskapsradions veckomagasin | Sveriges Radio | |
| 76 | 10 |  | The DemystifySci Podcast | DemystifySci | |
| 77 | 5 |  | Mysterious Radio: Paranormal, UFO and Lore Interviews | Podcast Audio House | |
| 78 | 25 |  | Short Wave | NPR | |
| 79 | — | L | La Suite dans les idées | France Culture | |
| 80 | 24 |  | The Plodcast | Our Media | |
| 81 | 24 |  | Dumma Människor | Acast - Lina Thomsgård och Björn Hedensjö | |
| 82 | 24 |  | Choiceology with Katy Milkman | Charles Schwab | |
| 83 | 23 |  | Something You Should Know | Mike Carruthers | OmniCast Media | |
| 84 | 23 |  | Sasquatch Chronicles | Sasquatch Chronicles - Bigfoot Encounters | |
| 85 | 22 |  | Science Friday | Science Friday and WNYC Studios | |
| 86 | 34 |  | Naked Astronomy, from the Naked Scientists | The Naked Scientists | |
| 87 | 23 |  | Clinician's Brief: The Podcast | Clinician's Brief | |
| 88 | 23 |  | The Resetter Podcast with Dr. Mindy | Dr. Mindy Pelz | |
| 89 | 23 |  | More or Less | BBC Radio 4 | |
| 90 | 22 |  | Bigfoot and Beyond with Cliff and Bobo | Bigfoot and Beyond LLC | |
| 91 | 22 |  | Somewhere in the Skies | SpectreVision Radio | |
| 92 | 22 |  | The Origins Podcast with Lawrence Krauss | Lawrence M. Krauss | |
| 93 | 22 |  | The Michael Shermer Show | Michael Shermer | |
| 94 | 17 |  | Why Do We Do That? | BBC Radio 4 | |
| 95 | 21 |  | Stuff To Blow Your Mind | iHeartPodcasts | |
| 96 | 21 |  | The Grave Talks | Haunted, Paranormal & Supernatural | Ghost Stores, Haunted, Paranormal & Supernatural Stories | |
| 97 | 21 |  | Quirks and Quarks | CBC | |
| 98 | 15 |  | The Hydrogen Podcast | Paul Rodden | |
| 99 | 15 |  | ScienceStuff | iHeartPodcasts | |
| 100 | 22 |  | Videnskabeligt Udfordret | Mark Lyng, Flemming Damgaard, Nikolaj V. Hansen | |
