Science subreddits
We found 53 active science subreddits: communities with at least one new post a day on average in September 2026, ranked by members. The largest is r/science with 34.6M members. The busiest is r/askscience, with 6,358 posts last month. In 2 of the 31 we could measure, a brand-new account's post usually stays up: they remove 17% or fewer of posts from accounts under a week old.
Data for 53 communitiesDownload CSV
Filter it by your account age and karma, the audience you want and the best time to post.
- r/science34.6M members
- r/askscience6,358 posts in September 2026
- r/HotScienceNews+137% members in 12 months
- r/InterstellarKinetics11% of new-account posts removed
All active science subreddits, by members
| # | Subreddit | Members | Posts / month | Member growth, 12 mo | Median author age | Women | Posts with a reply | New-account posts removed | Links |
|---|---|---|---|---|---|---|---|---|---|
| 1 | r/science↗This community is a place to share and discuss new scientific research. Read about the latest advances in astronomy, biology, medicine, physics, social science, and more. Find and submit new publicati | 34.6M | 1,122 | +1% | 31 | 23% | 95% | 91% | Yes |
| 2 | r/askscience↗Ask a science question, get a science answer. | 26.4M | 6,358 | +1% | 27 | 20% | 12% | 100% | No |
| 3 | r/sciencememes↗Science Memes | 3.89M | 326 | +2% | 30 | 20% | 86% | 39% | Yes |
| 4 | r/labrats↗Welcome to r/LabRats! A space for scientists, researchers, and lab workers to share experiment fails, lab wins, and PI woes. Do you need advice, a place to vent, or just some lab-life humor? Want to s | 730K | 1,142 | +7% | 28 | 46% | 84% | 51% | Yes |
| 5 | r/EverythingScience↗/r/EverythingScience is the sister subreddit to /r/science. With a broader rule set than /r/science, it is the place for high quality scientific content that doesn't necessarily reference a peer-revie | 667K | 344 | +9% | 34 | 24% | 53% | 89% | Yes |
| 6 | r/Nootropics↗Research and discussion on nootropics and cognitive enhancers. | 453K | 332 | +6% | 29 | 22% | 97% | 70% | Yes |
| 7 | r/skeptic↗A sub for "scientific skepticism." Scientific Skepticism is about combining knowledge of science, philosophy, and critical thinking with careful analysis to help identify flawed reasoning and decepti | 354K | 204 | +7% | 38 | 21% | 87% | 94% | Yes |
| 8 | r/sciences↗A community for people who like science | 241K | 123 | +10% | 33 | 21% | 41% | Min. age/karma | Yes |
| 9 | r/longevity↗The geroscience hypothesis proposes it is possible to delay or prevent the onset of age-related ill health and increase healthy lifespan by targeting the biological mechanisms of aging. The main focus | 214K | 86 | +9% | 32 | 19% | 53% | Min. age/karma | Yes |
| 10 | r/AskScienceDiscussion↗Here you can ask any question you have about being a scientist, what's new in a field, what's going to happen in a field, or are curious about how we got to this point. | 194K | 199 | +16% | 30 | 20% | 76% | 82% | No |
| 11 | r/AncestryDNA↗A place to share your heritage, genetic ancestry, and explore the amazing family stories people have to share! | 176K | 1,411 | +26% | 32 | 60% | 78% | 22% | Yes |
| 12 | r/timetravel↗Time travel reddit will exist yesterday | 167K | 297 | +22% | 38 | 21% | 72% | Min. age/karma | Yes |
| 13 | r/immortalists↗Everything about longevity and related topics like: Health, AI, human enhancements, Anti-Aging, Longevity, Robotics, Faith in Jesus Christ, Genetic Editing, Biotechnology, immortality... Our Goal is: | 139K | 325 | +101% | 38 | 24% | 65% | 63% | Yes |
| 14 | r/STEW_ScTecEngWorld↗Welcome to r/STEWorld—where Science, Technology, and Engineering meet the rest of the World. Discover a community exploring STEM alongside everyday global interests and disciplines! | 124K | 277 | +28% | 38 | 12% | 49% | – | Yes |
| 15 | r/ScienceUncensored↗ScienceUncensored is a place for anyone to post any interesting science or technology related news, data, articles, pictures, musings etc. This reddit is about uncensored science - not about those who | 113K | 35 | +2% | 35 | 17% | 94% | Approved only | Yes |
| 16 | r/NooTopics↗The Official Subreddit of NooTopics. Where the boundaries of cognition and health are pushed by cutting edge scientific research and discussion. All biohacking science is welcome. Please note this | 113K | 713 | +88% | 33 | 24% | 53% | 96% | Yes |
| 17 | r/scienceisdope↗𝗦𝗰𝗶𝗲𝗻𝗰𝗲, 𝗿𝗮𝘁𝗶𝗼𝗻𝗮𝗹𝗶𝘁𝘆 𝗮𝗻𝗱 𝗺𝗲𝗺𝗲𝘀! The official subreddit of the Indian science and rationality YouTuber, Pranav aka 𝐒𝐜𝐢𝐞𝐧𝐜𝐞 𝐈𝐬 𝐃𝐨𝐩𝐞! | 105K | 237 | +35% | 25 | 18% | 100% | 82% | Yes |
| 18 | r/nuclear↗Focus on peaceful use of nuclear energy tech, economics, news, and climate change. | 101K | 208 | +24% | 32 | 12% | 78% | Min. age/karma | Yes |
| 19 | r/Science_India↗Welcome to Science India, a subreddit dedicated to celebrating India's scientific achievements and innovations. From space missions and AI advancements to traditional sciences like Ayurveda, we cove | 94K | 58 | +18% | 25 | 16% | 21% | 62% | Yes |
| 20 | r/water↗Devoted to the science and politics of water: aquifers, dams, hydrology, boundary disputes, peak water, riparian rights, climate change, drought & flooding, stormwater, groundwater, fish kills, fossil | 91K | 317 | +48% | 35 | 25% | 61% | 93% | Yes |
| 21 | r/StrongerByScience↗A subreddit to discuss exercise and sport science, plus the content in the Stronger By Science media empire. | 88K | 86 | +33% | 33 | 13% | 82% | 61% | Yes |
| 22 | r/HotScienceNews↗Your go-to subreddit for the latest breakthroughs, discoveries, and exciting updates from the world of science. | 81K | 298 | +137% | 37 | 34% | 66% | – | Yes |
| 23 | r/Futurism↗A subreddit focused on the technological advancements, systemic changes and scientific breakthroughs that will shape the future of humanity. | 80K | 236 | +31% | 38 | 14% | 99% | 25% | Yes |
| 24 | r/ABA↗A community dedicated to the science, the practice, and the never-ending evolution of applied behavior analysis. Composed primarily of ABA professionals and students, we also welcome caregivers, clien | 77K | 754 | +25% | 27 | 77% | 76% | 99% | Yes |
| 25 | r/PrehistoricLife↗Post anything related to prehistoric fauna and flora, the evolution of life, geology, paleontology, archaeology, and ancient human cultures. | 65K | 203 | +44% | 31 | 23% | 49% | 41% | Yes |
| 26 | r/scihub↗Discussion community about the biggest shadow library for research articles. Not affiliated with the site. Current Sci-Hub domains: https://en.wikipedia.org/wiki/Sci-Hub | 58K | 45 | +15% | 28 | 23% | 99% | – | Yes |
| 27 | r/VXJunkies↗A community for discussing the science and theory of Volt Xocula and its applications. | 57K | 41 | +5% | 29 | 13% | – | Min. age/karma | Yes |
| 28 | r/AWLIAS↗SIMULATION HYPOTHESIS and REALITY | 51K | 57 | +13% | 34 | 24% | 49% | 27% | Yes |
| 29 | r/ContagionCuriosity↗A community for those curious about contagions. Discuss outbreaks, track emerging diseases, and prepare for future health threats. | 46K | 148 | +136% | 39 | 69% | 93% | Min. age/karma | Yes |
| 30 | r/InterstellarKinetics↗new-account friendlyMission Control For The Frontier Of Cosmic Intelligence & Human Knowledge 🚀 Curating the breakthroughs reshaping civilization. What We Cover: 🤖 AI, automation & emerging technology 🧬 Biotech, longev | 46K | 414 | +124270% | 40 | 17% | 89% | 11% | Yes |
Show all 53 subreddits
| # | Subreddit | Members | Posts / month | Member growth, 12 mo | Median author age | Women | Posts with a reply | New-account posts removed | Links |
|---|---|---|---|---|---|---|---|---|---|
| 31 | r/fusion↗Discussion and news on advancements in the field of nuclear fusion energy and related technologies. | 46K | 176 | +30% | 34 | 10% | 59% | – | Yes |
| 32 | r/pharmacology↗News, peer-reviewed academic articles, and discussion of pharmacology & toxicology, with a particular focus on new drugs. | 36K | 81 | +12% | 25 | 35% | 30% | 100% | Yes |
| 33 | r/signalidentification↗Help with identifying radio signals. | 36K | 63 | +48% | 35 | 11% | 81% | – | Yes |
| 34 | r/cellular_automata↗This is a subreddit about cellular automata (singular: cellular automaton). For example, Rule 110, Conway's Game of Life, and the Biham-Middleton-Levine traffic model. | 35K | 74 | +38% | 29 | 11% | 47% | – | Yes |
| 35 | r/illustrativeDNA↗Share and discuss about your ILLUSTRATIVE DNA results. | 32K | 358 | +31% | 26 | 29% | 64% | 70% | Yes |
| 36 | r/Acoustics↗For discussion of everything related to acoustics, including Architectural Acoustics, Electroacoustics, Engineering Dynamics, Environmental Noise, Noise and Vibration, Hearing, Measurements and Instru | 31K | 220 | +35% | 33 | 14% | 69% | 19% | Yes |
| 37 | r/HerpesCureResearch↗This is a space for promoting cure and vaccine research for herpes simplex virus (HSV 1&2). This group focuses on fundraising and activism to promote better treatments, vaccines and a cure for HSV. We | 31K | 60 | +9% | 29 | 50% | 42% | 95% | Yes |
| 38 | r/Time↗Welcome to r/Time – Where Every Moment Matters! Discover a community devoted to exploring the endless facets of time—from the mysteries of physics and the depths of philosophy to historical insights | 28K | 142 | +64% | 35 | 20% | 56% | 85% | Yes |
| 39 | r/Immunology↗Discussion of immunology related topics. Peer review, pop science or news articles allowed. Please do not post questions asking for medical advice or espousing pseudo-science. | 26K | 71 | +31% | 30 | 48% | 53% | 98% | Yes |
| 40 | r/psychopharmacology↗News, peer-reviewed academic articles, and discussion of drugs that act on the central nervous system, with a particular focus on new drugs. | 22K | 60 | +13% | 27 | 32% | 61% | – | Yes |
| 41 | r/chemtrails↗This subreddit is a resource for sharing images of "chemtrails" and discussing the "phenomena" as a separate idea from contrails. Note: This is primarily a satirical subreddit | 22K | 71 | +22% | 40 | 13% | 89% | 54% | Yes |
| 42 | r/EnergyStorage↗A reddit focused on the storage of energy for later use. This includes things like batteries, capacitors, *super*-capacitors, flywheels, air compression, oil compression, mechanical compression, fuel | 17K | 121 | +46% | 36 | 11% | 30% | – | Yes |
| 43 | r/paleonews↗News about all things paleontology | 17K | 50 | +19% | 34 | 21% | 22% | – | Yes |
| 44 | r/science2↗Everything science. An alternative to reddit's stodgy main science sub-reddit. Here articles need not be peer reviewed, just about science and interesting! | 17K | 160 | +88% | 39 | 19% | 34% | – | Yes |
| 45 | r/SGU↗The Skeptics' Guide to the Universe is dedicated to promoting critical thinking and science literacy through insightful content and resources including an award-winning weekly podcast. This official s | 15K | 56 | +33% | 40 | 16% | 92% | – | Yes |
| 46 | r/COVID19_Pandemic↗The capitalist class & their govts let COVID19 spread to keep capitalism, reliant on the extraction of surplus value from workers, from collapsing. This SARS pandemic is ongoing, affecting human healt | 13K | 77 | +4% | 40 | 40% | 30% | – | Yes |
| 47 | r/complexsystems↗This subreddit aims to be a hub of information, resources, news, and discussions related to complex systems science. As those interested in complexity, we realize the linking of nodes is just as impor | 11K | 49 | +72% | 32 | 15% | 39% | 17% | Yes |
| 48 | r/massspectrometry↗News and discussions for people involved and interested in mass spectrometry. | 11K | 54 | +24% | 32 | 28% | 74% | – | Yes |
| 49 | r/BCI↗Brain Computer Interfaces - A forum for hobbyists, researchers, tinkerers and industry people. | 11K | 89 | +44% | 27 | 22% | 43% | Min. age/karma | Yes |
| 50 | r/scientistsPH↗new-account friendlyFor Filipino scientists and enthusiasts. Post your content! News, publications, discussions, questions/advice, features, events, etc! Let’s be kind to one another and maintain mind-stimulating discuss | 11K | 192 | +69% | 25 | 55% | 61% | 2% | Yes |
| 51 | r/FermiParadox↗A sub dedicated to discussing the Fermi Paradox. | 10K | 81 | +95% | 40 | 9% | 92% | – | Yes |
| 52 | r/cybernetics↗ Welcome to r/Cybernetics - Cybernetics is the interdisciplinary study of systems, communication, and control in animals, machines, and organizations. It focuses on feedback, self-regulation, and adap | 8.7K | 31 | – | 31 | 15% | 45% | – | Yes |
| 53 | r/MichaelLevinBiology↗Welcome to the Michael Levin Science Community, a hub for enthusiasts, researchers, and curious minds alike! Explore the pioneering work of Dr. Michael Levin from Tufts University, spanning bioelectri | 2.8K | 104 | – | 38 | 13% | 50% | – | Yes |
Looking for a ranking by size and growth? Top science subreddits by tier.
How this list is built
Subreddits are grouped into topics by what their posts are about; this list holds the science group. We include subreddits that are safe for work and had at least 30 new posts in September 2026, about one a day.
Members is Reddit's subscriber count; growth compares it with a year earlier. Posts with a reply is the share of posts that got at least one comment over the last three months. Median author age and women are estimated from what authors say about themselves, and shown only when enough of them did. New-account posts removed is the share of posts from accounts younger than 7 days that were removed; communities at or below 17% are marked new-account friendly. Min. age/karma means the subreddit asks for a minimum account age or karma before you can post.
The list is rebuilt every month from public Reddit posts and comments. Data and CSV are free to reuse under CC BY 4.0 with a link to this page.
Science subreddits: common questions
What is the biggest science subreddit?
r/science, with 34.6M members in September 2026. Next are r/askscience (26.4M) and r/sciencememes (3.89M).
Which science subreddits are the most active?
By posts in September 2026: r/askscience (6,358 posts), r/AncestryDNA (1,411 posts) and r/labrats (1,142 posts).
Which science subreddits can a new account post in?
r/InterstellarKinetics (11% of new-account posts removed) and r/scientistsPH (2% of new-account posts removed). They ask for no minimum karma or account age, and most posts from accounts under a week old stay up.
How often is this list updated?
Every month, when we rebuild our subreddit data. This version uses data for September 2026. Member counts come from Reddit; activity, removals and who writes come from public Reddit posts and comments.
Find the subreddits that fit your post
This list is the same for everyone. Find Subs narrows it to communities your account can post in, where your audience writes, and tells you when to post.