| 1 | — |  | Hidden Brain | Hidden Brain, Shankar Vedantam | |
| 2 | 1 |  | StarTalk Radio | Neil deGrasse Tyson | |
| 3 | 1 |  | The Infinite Monkey Cage | BBC Radio 4 | |
| 4 | 5 |  | The Naked Scientists Podcast | The Naked Scientists | |
| 5 | 2 |  | Curious Cases | BBC Radio 4 | |
| 6 | 2 |  | Making Sense with Sam Harris | Sam Harris | |
| 7 | 2 |  | Ologies with Alie Ward | Alie Ward | |
| 8 | 5 |  | Radiolab | WNYC Studios | |
| 9 | 3 |  | Science Vs | Spotify Studios | |
| 10 | 6 |  | Unexplainable | Vox | |
| 11 | 1 |  | The Resetter Podcast with Dr. Mindy | Dr. Mindy Pelz | |
| 12 | — |  | The Psychology Podcast | iHeartPodcasts | |
| 13 | 6 |  | Nature Podcast | Springer Nature Limited | |
| 14 | 66 |  | People Who Read People: A Behavior and Psychology Podcast | Zachary Elwood | |
| 15 | 19 |  | This Podcast Will Kill You | Exactly Right and iHeartPodcasts | |
| 16 | 63 |  | 5 Live Science Podcast | BBC Radio 5 Live | |
| 17 | 7 |  | Reinvent Yourself with Dr. Tara | Dr. Tara Swart Bieber | |
| 18 | 9 |  | All In The Mind | ABC | |
| 19 | 3 |  | Speaking of Psychology | American Psychological Association | |
| 20 | 5 |  | Most Terrifying Places in America | Travel Channel | |
| 21 | 7 |  | More or Less | BBC Radio 4 | |
| 22 | 11 |  | Crash Course Pods: The Universe | Crash Course Pods, Complexly | |
| 23 | 2 |  | Sean Carroll's Mindscape: Science, Society, Philosophy, Culture, Arts, and Ideas | Sean Carroll | |
| 24 | 23 | E | Easy Physics | Easy Physics | |
| 25 | 28 | T | The Birding Life Podcast Network | The Birding Life Podcast Network | |
| 26 | 8 | L | Let's Talk Micro | Luis Plaza | |
| 27 | 10 |  | Science Weekly | The Guardian | |
| 28 | 44 |  | Professor Brian Cox Live Q and A Podcast | The Cosmic Shambles Network | |
| 29 | 11 |  | Science Friday | Science Friday and WNYC Studios | |
| 30 | 10 |  | Short Wave | NPR | |
| 31 | — |  | The Common Descent Podcast | Common Descent | |
| 32 | 9 |  | Sasquatch Chronicles | Sasquatch Chronicles - Bigfoot Encounters | |
| 33 | 73 |  | You Are Not So Smart | You Are Not So Smart | |
| 34 | 12 |  | Uncharted with Hannah Fry | BBC Radio 4 | |
| 35 | 4 |  | The Skeptics' Guide to the Universe | Dr. Steven Novella | |
| 36 | 49 | W | Wildest Kruger Stories | Karolina Norée | |
| 37 | 12 |  | How We're Wired | The Bertarelli Foundation | |
| 38 | 10 | M | Mathematics Simplified | Anjali Sharma | |
| 39 | 50 |  | Ask the Naked Scientists | Dr Chris Smith | |
| 40 | — |  | The Plodcast | Our Media | |
| 41 | 15 |  | Tooth & Claw: True Stories of Animal Attacks | Wes Larson, Jeff Larson, Mike Smith | Daylight Media | |
| 42 | — |  | The Future of Everything | Stanford Engineering | |
| 43 | 129 |  | NASA's Curious Universe | National Aeronautics and Space Administration (NASA) | |
| 44 | 12 |  | The Astrophysics Podcast | Paul Duffell | |
| 45 | — |  | Planetary Radio: Space Exploration, Astronomy and Science | The Planetary Society | |
| 46 | 6 |  | BBC Inside Science | BBC Radio 4 | |
| 47 | 135 |  | The Quanta Podcast | Quanta Magazine | |
| 48 | 141 |  | The History of Chemistry | Steve Cohen | |
| 49 | 11 |  | Wild Times: Wildlife Education | Wildlife Educator - Forrest Galante | |
| 50 | — |  | Deep Insights with Mining Review Africa | Mining Review Africa | |
| 51 | — |  | Bite Back with Abbey Sharp | Abbey Sharp / Frequency Podcast Network | |
| 52 | 13 |  | The BUMP Podcast | Bo Kennedy | |
| 53 | — | T | Tweet of the Day | BBC Radio 4 | |
| 54 | — |  | Drilled | Pushkin Industries | |
| 55 | 14 |  | The Wild with Chris Morgan | KUOW News and Information | |
| 56 | 21 |  | DarkHorse Podcast | Bret Weinstein & Heather Heying | |
| 57 | — |  | Chemistry For Your Life | Melissa and Jam, Bleav | |
| 58 | 28 |  | Brave New Planet | Pushkin Industries | |
| 59 | — | N | New Books in Environmental Studies | Marshall Poe | |
| 60 | — | T | The Universe Speaks in Numbers | Faber and Faber | |
| 61 | — | T | The Brain and Brand Show | Podcast Party | |
| 62 | — |  | Shark Week: The Podcast | Discovery | |
| 63 | — | P | Pediatric Anesthesia Podcast | Pediatric Anesthesia | |
| 64 | — |  | Hillbilly Horror Stories Paranormal Podcast | Jerry Paulley | |
| 65 | — |  | Stereo Chemistry | Chemical & Engineering News | |
| 66 | — | L | La fabrique du savoir | Le Monde | |
| 67 | — |  | Chromatography Life | Waters Corporation | |
| 68 | — | E | EADV Podcast | EADV | |
| 69 | — | C | Cultures of Energy | Dominic Boyer | |
| 70 | 41 |  | Something You Should Know | Mike Carruthers | OmniCast Media | |
| 71 | 38 | T | The Natural History Podcast | James Mills | |
| 72 | — |  | Unexpected Elements | BBC World Service | |
| 73 | 10 |  | Blurry Creatures | Blurry Creatures | |
| 74 | 37 |  | Stuff To Blow Your Mind | iHeartPodcasts | |
| 75 | 37 |  | CrowdScience | BBC World Service | |
| 76 | 40 |  | Into the Impossible With Brian Keating | Big Bang Productions Inc. | |
| 77 | 23 |  | The Michael Shermer Show | Michael Shermer | |
| 78 | 36 |  | Origin Stories | The Leakey Foundation | |
| 79 | 36 | W | World of Sharks | Save Our Seas Foundation | |
| 80 | 35 |  | Scotland Outdoors | BBC Radio Scotland | |
| 81 | 37 |  | The Science of Everything Podcast | James Fodor | |
| 82 | 10 |  | Psychiatry & Psychotherapy Podcast | David Puder, M.D. | |
| 83 | 34 |  | Speed & Scale | TED | |
| 84 | 38 |  | Head Shepherd | Mark Ferguson | |
| 85 | 37 |  | Overheard at National Geographic | National Geographic | |
| 86 | 3 |  | Freakonomics, M.D. | Freakonomics Radio + Stitcher | |
| 87 | 30 |  | PlanetGeo: The Geology Podcast | Chris and Jesse | |
| 88 | 33 | R | Richard Wiseman's On Your Mind | Podimo & TellTale | |
| 89 | 38 |  | BrainStuff | iHeartPodcasts | |
| 90 | 34 |  | Multiverse 5D @ M5D | Multiverse 5D Network | |
| 91 | 33 |  | Paranormal Mysteries | Nic Ryan | Paranormal Mysteries Podcast | |
| 92 | 4 |  | Daniel and Kelly’s Extraordinary Universe | iHeartPodcasts | |
| 93 | 43 |  | All Creatures Podcast | All Creatures Podcast | |
| 94 | 92 |  | The world, the universe and us | New Scientist | |
| 95 | 35 | H | Hopkins Biotech Podcast | Hopkins Biotech Podcast | |
| 96 | 34 | N | National Geographic Magazine | Radio Eye | |
| 97 | 36 |  | Songs 4 FRCR: Radiology FRCR 2A Revision | FRCR Revision | |
| 98 | 30 |  | The Supermassive Podcast | The Royal Astronomical Society | |
| 99 | 9 |  | Science In Action | BBC World Service | |
| 100 | 18 |  | Discovery | BBC World Service | |
