| 1 | — |  | Ologies with Alie Ward | Alie Ward | |
| 2 | 1 |  | The Infinite Monkey Cage | BBC Radio 4 | |
| 3 | 1 |  | Making Sense with Sam Harris | Sam Harris | |
| 4 | 6 |  | Radiolab | WNYC Studios | |
| 5 | 7 |  | Reinvent Yourself with Dr. Tara | Dr. Tara Swart Bieber | |
| 6 | 5 |  | BBC Inside Science | BBC Radio 4 | |
| 7 | 2 |  | Uncharted with Hannah Fry | BBC Radio 4 | |
| 8 | 5 |  | Curious Cases | BBC Radio 4 | |
| 9 | — | O | Our Changing World | RNZ | |
| 10 | 9 |  | All In The Mind | ABC | |
| 11 | 3 |  | Science Weekly | The Guardian | |
| 12 | 2 |  | StarTalk Radio | Neil deGrasse Tyson | |
| 13 | 9 |  | The Resetter Podcast with Dr. Mindy | Dr. Mindy Pelz | |
| 14 | 47 |  | Speaking of Psychology | American Psychological Association | |
| 15 | 1 | G | Goodfellow Unit | The Goodfellow Unit (University of Auckland) | |
| 16 | 81 |  | Science In Action | BBC World Service | |
| 17 | 10 |  | Hidden Brain | Hidden Brain, Shankar Vedantam | |
| 18 | 12 |  | This Podcast Will Kill You | Exactly Right and iHeartPodcasts | |
| 19 | 5 |  | The Naked Scientists Podcast | The Naked Scientists | |
| 20 | 3 |  | The world, the universe and us | New Scientist | |
| 21 | 6 |  | Discovery | BBC World Service | |
| 22 | 7 |  | Overheard at National Geographic | National Geographic | |
| 23 | 84 | B | Blazing the Trail | University of Sydney / Australian Museum / Break Thru Films | |
| 24 | 9 |  | Crash Course Pods: The Universe | Crash Course Pods, Complexly | |
| 25 | 7 |  | Science Vs | Spotify Studios | |
| 26 | — | S | Samoan Scientist Podcast | Amy | |
| 27 | 9 |  | Unexplainable | Vox | |
| 28 | 5 |  | The Great Simplification with Nate Hagens | Nate Hagens | |
| 29 | 8 |  | Why Do We Do That? | BBC Radio 4 | |
| 30 | 10 |  | Sean Carroll's Mindscape: Science, Society, Philosophy, Culture, Arts, and Ideas | Sean Carroll | |
| 31 | 51 |  | Physics World Weekly Podcast | Physics World | |
| 32 | 45 |  | The Joy of Why | Steven Strogatz, Janna Levin and Quanta Magazine | |
| 33 | 46 |  | Mongabay Newscast | Mongabay.com | |
| 34 | 12 |  | The Skeptics' Guide to the Universe | Dr. Steven Novella | |
| 35 | 24 |  | CrowdScience | BBC World Service | |
| 36 | 57 | M | MissPerceived | Audiocrafty | |
| 37 | 73 |  | The End Of The World with Josh Clark | iHeartPodcasts | |
| 38 | 70 |  | NASA's Curious Universe | National Aeronautics and Space Administration (NASA) | |
| 39 | 62 |  | The Michael Shermer Show | Michael Shermer | |
| 40 | 126 |  | TheThinkingAtheist | The Thinking Atheist | |
| 41 | 13 |  | More or Less | BBC Radio 4 | |
| 42 | 17 | F | Full PreFrontal: Exposing the Mysteries of Executive Function | Sucheta Kamath | |
| 43 | 17 | T | The Force of Nature Podcast | Conan Moynihan | |
| 44 | 17 |  | The Supermassive Podcast | The Royal Astronomical Society | |
| 45 | — |  | Quirks and Quarks | CBC | |
| 46 | — |  | You Are Not So Smart | You Are Not So Smart | |
| 47 | — |  | I Was Prey | Animal Planet | |
| 48 | — |  | Sustainababble | Sustainababble: comedy, nature, climate change. | |
| 49 | — | T | The Best of Making Sense with Sam Harris | Sam Harris | |
| 50 | — | P | Physics | Yale University | |
| 51 | — | W | Whale Tales Podcast | Whale Tales | |
| 52 | — | M | Mind Brew | Jacqui Maguire | |
| 53 | — |  | Know What You See with Brian Lowery | Brian S. Lowery | |
| 54 | — | C | Circulation on the Run | Greg Hundley, MD and Peder Myhre, MD, PhD | |
| 55 | — | M | MIT News | Massachusetts Institute of Technology (MIT) | |
| 56 | — | T | The Anti-Dread Climate Podcast | KCRW | |
| 57 | — |  | Environment, Climate Change, Renewable Energy, Regeneration, Sustainability, Nature, Politics, Circular Economy - One Planet | Environmental Solutions - One Planet Podcast - Creative Process Original Series | |
| 58 | — |  | Aha! With JAHA | JAHA – Journal of the American Heart Association | |
| 59 | — | B | Built with Biology: Podcast | SynBioBeta | |
| 60 | — | B | Built with Biology: Spotlight | SynBioBeta | |
| 61 | — | R | Rossifari Podcast - Zoos, Aquariums, and Animal Conservation | Rossifari | |
| 62 | — | T | The SynBioBeta Podcast | John Cumbers | |
| 63 | — | T | The ClimateReady Podcast: Adapting to Climate Change & Uncertainty | The Alliance for Global Water Adaptation (AGWA) | |
| 64 | 34 | V | Voice of Tangaroa | RNZ | |
| 65 | 34 |  | That UFO Podcast | That UFO Podcast | |
| 66 | 22 |  | Flash Forward | Rose Eveleth | |
| 67 | 4 |  | Stuff To Blow Your Mind | iHeartPodcasts | |
| 68 | 6 |  | DarkHorse Podcast | Bret Weinstein & Heather Heying | |
| 69 | 37 |  | The Micah Hanks Program | Micah Hanks | |
| 70 | 29 | F | Feed for Thought | Pioneer Brand Products NZ | |
| 71 | 34 |  | Big Picture Science | Big Picture Science | |
| 72 | 12 |  | Daniel and Kelly’s Extraordinary Universe | iHeartPodcasts | |
| 73 | 38 | W | Why? with Emma Kennedy | Podmasters | |
| 74 | 40 |  | Unbiased Science | @unbiasedscipod | |
| 75 | 64 |  | Unexpected Elements | BBC World Service | |
| 76 | 22 |  | SpaceTime with Stuart Gary | Stuart Gary | |
| 77 | 39 |  | SciShow Tangents | Complexly | |
| 78 | 35 |  | Instant Genius | Our Media | |
| 79 | 39 |  | The Science of Happiness | PRX and Greater Good Science Center | |
| 80 | 41 |  | Creature Feature | iHeartPodcasts | |
| 81 | 18 |  | Short Wave | NPR | |
| 82 | 40 |  | Outside/In | NHPR | |
| 83 | 38 |  | Stars, Cells, and God | Reasons to Believe | |
| 84 | 38 | L | Living Mirrors with Dr. James Cooke | Dr. James Cooke | |
| 85 | 38 | H | How To Save The World Podcast | Little Empire Podcasts | |
| 86 | 38 |  | Bigfoot Terror in the Woods Sightings and Encounters | W.J. Sheehan | |
| 87 | 38 |  | The House of Pod | Kaveh MD | |
| 88 | 36 | N | New Books in Anthropology | New Books Network | |
| 89 | 39 | T | The Contemplative Science Podcast | Mark Miller | |
| 90 | 39 | T | The Birding Life Podcast Network | The Birding Life Podcast Network | |
| 91 | 34 | T | The Deadly Dose | Harini Bhat & Megan Gesner | |
| 92 | 38 | S | Speaking of Mol Bio | Thermo Fisher Scientific | |
| 93 | 38 | W | Word on the Reef | Tanya Murphy | |
| 94 | 38 |  | The Soil Sessions: A Kinsey Ag Podcast | Kinsey Ag | |
| 95 | 30 |  | Dr Karl Podcast | triplej | |
| 96 | 43 | S | Shirtloads of Science | Dr Karl Kruszelnicki | |
| 97 | 39 |  | Head Shepherd | Mark Ferguson | |
| 98 | 23 |  | Inner Cosmos with David Eagleman | iHeartPodcasts | |
| 99 | 3 |  | Science Friday | Science Friday and WNYC Studios | |
| 100 | 34 | B | Because Why?! The Science and Society Pod. | Brianne West | |
