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r/askscience

26.3M members. The best post we have captured here reached 6.6K upvotes, which works out to 0 per 1,000 members.

0peak upvotes per 1,000 members
26.3Mmembers
6.6Kbest post
574most comments
300posts we track

Open r/askscience on Reddit ↗

What actually lands here

The mix of post types among everything we have captured. Posting a link where almost nothing but images lands is wasted effort, and this is the fastest way to see it.

92%
Question 92% Text 7%

The topics it labels

Flairs are the community's own categories, and the closest thing a subreddit has to telling you what it wants.

Biology 94 Earth Sciences 53 Astronomy 31 Physics 28 Chemistry 16 Human Body 15 Engineering 14 Planetary Sci. 11 Computing 8 Medicine 8

What the ceiling looks like

The biggest posts we have captured here. Links go to the original on Reddit.

Do wild animals have free time? What do they do with it?

↑ 6.6K 💬 416 question 2026

If a vacuum is an excellent insulator, wouldn’t heat build up in spacecraft?

↑ 3.6K 💬 574 question 2026

If a spider sets up a web and nothing is caught does the spider move locations and if so how long does it take for them to decide to do so?

↑ 2.3K 💬 180 question 2026

What is actually happening in the 5 to 10 seconds when I absolutely cannot do another rep at the gym, take that extremely short rest, and then can li…

↑ 2.2K 💬 88 question 2026

What is the benefit of explosive diarrhea?

↑ 2K 💬 247 question 2026

How do ants "calculate" the cost-benefit analysis of a food source before committing workers to it? Do they factor in distance, food type, and energy…

↑ 1.8K 💬 141 question 2026

Does Voyager 1 even give us any interesting information anymore?

↑ 1.7K 💬 236 question 2026

Does everything that we consider to be "alive" - not just plants and animals, but all protists, fungus, bacteria, archaea, etc. - have DNA?

↑ 1.7K 💬 253 question 2026

What happens to water when it freezes in a completely rigid, sealed metal container?

↑ 1.7K 💬 306 question 2026

What happened with the acid rain scare of the 1980s?

↑ 1.6K 💬 461 question 2026

Communities its size

Within four times the member count either way, so the comparison is fair. Sorted by upside.

See what is climbing here before you write

ViralHunt tracks Reddit and eight other networks, records how every post grows, and puts what is taking off in front of your team in one list.

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Every figure here is what ViralHunt has captured from r/askscience, not everything the community has ever posted. We deliberately do not publish an average score: our sample is weighted toward a community's best posts, so an average would be flattering and wrong. Peak per 1,000 members is computed the same way for every community listed. See how we measure.