| 1 | — |  | Curious Cases | BBC Radio 4 | |
| 2 | — |  | Science Vs | Spotify Studios | |
| 3 | 1 |  | The Infinite Monkey Cage | BBC Radio 4 | |
| 4 | 1 |  | Radiolab | WNYC Studios | |
| 5 | 2 |  | More or Less | BBC Radio 4 | |
| 6 | — |  | Making Sense with Sam Harris | Sam Harris | |
| 7 | 31 |  | Uncharted with Hannah Fry | BBC Radio 4 | |
| 8 | 3 |  | Ologies with Alie Ward | Alie Ward | |
| 9 | — |  | Google DeepMind: The Podcast | Hannah Fry | |
| 10 | 2 |  | The world, the universe and us | New Scientist | |
| 11 | 1 |  | The Skeptics' Guide to the Universe | Dr. Steven Novella | |
| 12 | 2 |  | Hidden Brain | Hidden Brain, Shankar Vedantam | |
| 13 | 5 |  | StarTalk Radio | Neil deGrasse Tyson | |
| 14 | 1 |  | Discovery | BBC World Service | |
| 15 | 2 |  | BBC Inside Science | BBC Radio 4 | |
| 16 | 5 |  | Science Weekly | The Guardian | |
| 17 | 4 |  | All In The Mind | ABC | |
| 18 | 16 |  | This Week in Cardiology | Medscape | |
| 19 | 8 | G | Goodfellow Unit | The Goodfellow Unit (University of Auckland) | |
| 20 | 8 |  | The Resetter Podcast with Dr. Mindy | Dr. Mindy Pelz | |
| 21 | 10 |  | Science In Action | BBC World Service | |
| 22 | 17 |  | The Great Simplification with Nate Hagens | Nate Hagens | |
| 23 | 8 | B | Because Why?! The Science and Society Pod. | Brianne West | |
| 24 | 5 |  | Your Brain On | Drs. Ayesha and Dean Sherzai | |
| 25 | 6 |  | CrowdScience | BBC World Service | |
| 26 | 11 |  | Ingenious: how research transforms our world | UoAMediaTeam | |
| 27 | 11 |  | Blurry Creatures | Blurry Creatures | |
| 28 | — |  | Ask MIT Climate | MIT Climate Project | |
| 29 | 115 | T | The Force of Nature Podcast | Conan Moynihan | |
| 30 | 8 |  | WEAPONIZED with Jeremy Corbell & George Knapp | Jeremy Corbell and George Knapp | |
| 31 | 26 |  | Unexpected Elements | BBC World Service | |
| 32 | 161 | N | New Scientist Weekly | New Scientist | |
| 33 | 13 |  | Why This Universe? | Dan Hooper, Shalma Wegsman | |
| 34 | 19 |  | Physics World Weekly Podcast | Physics World | |
| 35 | — | A | Australian Wildlife Education: Wild Chats | Jodie Creek | |
| 36 | 52 |  | Ask a Spaceman! | Paul M. Sutter | |
| 37 | 14 |  | The Psychology Podcast | iHeartPodcasts | |
| 38 | 14 |  | Outrage + Optimism: The Climate Podcast | Persephonica and Global Optimism | |
| 39 | 7 |  | Science Quickly | Scientific American | |
| 40 | 12 | O | Our Changing World | RNZ | |
| 41 | 93 |  | Short Wave | NPR | |
| 42 | 52 |  | ScienceStuff | iHeartPodcasts | |
| 43 | 58 |  | Tooth & Claw: True Stories of Animal Attacks | Wes Larson, Jeff Larson, Mike Smith | Daylight Media | |
| 44 | 14 |  | Daniel and Kelly’s Extraordinary Universe | iHeartPodcasts | |
| 45 | 59 |  | Freakonomics, M.D. | Freakonomics Radio + Stitcher | |
| 46 | 56 | S | Smooth Brain Society | Smooth Brain Society | |
| 47 | 22 |  | The Naked Scientists Podcast | The Naked Scientists | |
| 48 | 22 |  | MinuteEarth | Minute Earth | |
| 49 | 14 | D | DOC Sounds of Science Podcast | Department of Conservation | |
| 50 | 8 |  | Universe Today Podcast | Fraser Cain | |
| 51 | 90 | S | Social Worker's Break Room | Treehouse Sound Inc. | |
| 52 | 19 |  | Robinson's Podcast | Robinson Erhardt | |
| 53 | 128 |  | The Science of Happiness | PRX and Greater Good Science Center | |
| 54 | 130 |  | DNA Today: A Genetics Podcast | Kira Dineen | |
| 55 | 145 |  | NASA's Curious Universe | National Aeronautics and Space Administration (NASA) | |
| 56 | — |  | Origin Stories | The Leakey Foundation | |
| 57 | — | W | What The Duck?! | ABC | |
| 58 | 111 |  | The Rumen Room Podcasts | cwestwood | |
| 59 | — |  | The Story Collider | Story Collider, Inc. | |
| 60 | 10 |  | Sasquatch Chronicles | Sasquatch Chronicles - Bigfoot Encounters | |
| 61 | — |  | Completely Arbortrary | Completely Arbortrary | |
| 62 | 15 |  | Stuff To Blow Your Mind | iHeartPodcasts | |
| 63 | 27 |  | Mysterious Universe | 8th Kind | |
| 64 | — |  | I Was Prey | Animal Planet | |
| 65 | 11 |  | DarkHorse Podcast | Bret Weinstein & Heather Heying | |
| 66 | — | G | Genetics in the Paddock with Emily | Emily Johnston | |
| 67 | — | A | Animals To The Max Podcast | Corbin Maxey | |
| 68 | — | T | The Mad Philosophers Society | The Mad Philosopher | |
| 69 | — |  | The Hamilton Morris Podcast | Hamilton Morris | |
| 70 | — |  | The Mushroom Hour Podcast | Mushroom Hour | |
| 71 | — | T | The Criminology Academy | Jose Sanchez and Jenn Tostlebe | |
| 72 | — |  | All Creatures Podcast | All Creatures Podcast | |
| 73 | 33 |  | The Climate Question | BBC World Service | |
| 74 | — |  | The Referral with Dr. Karan | Sony Music Entertainment | |
| 75 | — |  | Spacepod | Carrie Nugent | |
| 76 | — | N | Neuroscience of Everything | Dr Nand Muley, Ph.D. | |
| 77 | 28 |  | Sean Carroll's Mindscape: Science, Society, Philosophy, Culture, Arts, and Ideas | Sean Carroll | |
| 78 | 1 |  | The Science Show | ABC | |
| 79 | 34 | R | Rewilding In Action | Maureen Howard | |
| 80 | — | S | Shirtloads of Science | Dr Karl Kruszelnicki | |
| 81 | 40 | A | A Neuroscientist Explains | The Guardian | |
| 82 | 34 |  | This Podcast Will Kill You | Exactly Right and iHeartPodcasts | |
| 83 | 40 |  | People Helping Nature Podcast | Conservation Amplified | |
| 84 | 40 |  | The Market Gardener Podcast | JM Fortier | |
| 85 | 8 |  | Dr Karl Podcast | triplej | |
| 86 | 40 |  | The Supermassive Podcast | The Royal Astronomical Society | |
| 87 | 36 |  | The Episodic Table of Elements | T. R. Appleton | |
| 88 | 31 |  | The Michael Shermer Show | Michael Shermer | |
| 89 | 37 |  | Reinvent Yourself with Dr. Tara | Dr. Tara Swart Bieber | |
| 90 | 36 |  | Science Friday | Science Friday and WNYC Studios | |
| 91 | 11 | F | Feed for Thought | Pioneer Brand Products NZ | |
| 92 | 11 | O | Open Country | BBC Radio 4 | |
| 93 | 31 |  | Clearer Thinking with Spencer Greenberg | Spencer Greenberg | |
| 94 | 36 |  | The Weirdest Thing I Learned This Week | Popular Science | |
| 95 | 39 |  | Speed & Scale | TED | |
| 96 | 41 |  | Thoughtforms Life | Michael Levin | |
| 97 | 38 |  | Astronomy Cast | Fraser Cain and Dr. Pamela Gay | |
| 98 | 29 | R | Ri Science Podcast | The Royal Institution | |
| 99 | 21 |  | Every Animal Ever | Dr Cesar Puechmarin, Zach Mander | |
| 100 | 78 |  | This Week in Virology | Vincent Racaniello | |
