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Radiolab engagement report

@Radiolab - 233K followers on X

Measured over 3 original posts from a 30-day window, last computed on September 30, 2026.

Engagement

Per follower
0.001%
of 233K followers
Per impression
0.094%
2.1K views on a typical post
Reach
0.91%
of its followers see a post
Typical post
2
interactions (median)
Saved
0%
0 bookmarks on a typical post
Posting rate
0.1/day
active 10% of days
Peak time
17:00 UTC
Friday

Early reading. We have captured 3 original posts for this account, below the 8 we require before treating a median as settled. The numbers above describe what we have seen so far, not a finished profile of the account.

A typical post picks up 2 interactions against 233K followers, an engagement rate of 0.001%. Posts are seen about 2.1K times each, and 0.094% of those impressions turn into an interaction. That is about 0.912% of the follower count, which is the gap between an audience on paper and an audience in a timeline. Posting runs at about 0.1 posts a day over the last 30 days, though only 10% of days saw any activity at all. Most posts go out around 17:00 UTC, and Friday is the busiest day of the week. Of the 3 posts sampled, 100% carry an image or video and 100% link out. The account's strongest tracked post pulled 34 interactions, about 4.3x its own typical post. Only 3 original posts have been captured so far, fewer than the 8 posts we want behind a median before treating it as settled. Read the figures above as an early measurement of this account, not as a finished profile of it.

Measured over 3 original posts from a 30-day window, last computed on September 30, 2026.

Where this sits in the catalog

At 0.001%, Radiolab sits below the 10th percentile of the 204,694 accounts in this comparison. That places it in the bottom 25% band, which runs below 0.024%.

p100.004%
p250.024%
p50 (median)0.143%
p750.677%
p902.55%
p9982.4%
Engagement rate as a share of followers, across the 204,694 accounts we have scanned enough to measure. The axis is logarithmic, because the top and bottom of this population are about 22,880 times apart and a linear axis would flatten everything below the median into a single point.
Show the percentile table
Engagement rate percentiles
PercentileEngagement rate
10th percentile0.004%
25th percentile0.024%
50th percentile0.143%
75th percentile0.677%
90th percentile2.55%
99th percentile82.4%

This ruler is the whole measured catalog, not a size-matched group: it shows where the raw rate falls across every account we can measure, all of which are large. For a like-for-like comparison, read the size-band percentile above instead. See how the bands are built

Posting timing

This account posts most often around 17:00 UTC, and Friday is its busiest day of the week. The bars below are the catalog-wide pattern, with this account's own busiest slot marked. They do not show how this account performs at each hour: we keep one aggregate per account, not one per hour, so that measurement does not exist in our data.

Engagement by hour posted, UTCTwenty-four bars, one per UTC hour. Each bar shows how posts published in that hour compare with their own authors' median engagement. Bars above the centre line ran higher than the median, bars below ran lower. A marker flags Busiest hour: 17:00 UTC.
0003060912151821
Above the authors' own mediansBelowScale: plus or minus 111%Busiest hour: 17:00 UTC
Show engagement by hour posted, utc as a table
Engagement by hour posted, UTC
Hour (UTC)Vs author medianPosts
00:00 UTC-1%89K
01:00 UTC-2%90K
02:00 UTC-3%88K
03:00 UTC-4%94K
04:00 UTC-5%76K
05:00 UTC-4%75K
06:00 UTC-5%86K
07:00 UTC-5%93K
08:00 UTC-4%108K
09:00 UTC-4%124K
10:00 UTC-3%129K
11:00 UTC-3%141K
12:00 UTC-3%154K
13:00 UTC-3%167K
14:00 UTC-4%173K
15:00 UTC-2%176K
16:00 UTC-3%171K
17:00 UTC-3%159K
18:00 UTC-2%149K
19:00 UTC-2%141K
20:00 UTC-1%131K
21:00 UTC0%116K
22:00 UTC-2%100K
23:00 UTC-1%90K
Engagement by day of weekSeven bars, one per weekday, Sunday first. Each bar shows how posts published on that day compare with their own authors' median engagement. Bars above the centre line ran higher than the median, bars below ran lower. A marker flags Busiest day: Friday.
SunMonTueWedThuFriSat
Above the authors' own mediansBelowScale: plus or minus 111%Busiest day: Friday
Show engagement by day of week as a table
Engagement by day of week
DayVs author medianPosts
Sunday+5%393K
Monday+1%483K
Tuesday-2%520K
Wednesday-3%472K
Thursday-2%430K
Friday-3%447K
Saturday+2%393K
See what moves engagement across the whole catalogWhat counts as a good engagement rate at this size

Formats this account uses

Its own posting mix on the left, and what each of those formats does across every account we track on the right. Only formats where the effect clears our publish test appear here, so an empty row is a format we could not measure rather than one that does nothing.

This account's posting mix compared with catalog-wide effects
FormatThis accountCatalog effect95% intervalAccounts behind it
Image or video100% of posts+111%+108% to +115%34K
Outbound link100% of posts-41%-42% to -40%32K
Typical length-+15%+14% to +16%32K
  • 100% of this account's sampled posts carry an image or video. Across the catalog, posts with an image or video run 111% above the same accounts' other posts.
  • 100% of its posts carry a link off X. Across the catalog, posts with an outbound link run 41% below the same accounts' other posts, so a large share of this account's output sits in the weakest bucket we measure.
  • Its average post runs 285 characters, which falls in the over 280 characters band. Across the catalog, posts over 280 characters run 15% above the same accounts' other posts.

These are catalog-wide differences applied to this account's own posting mix, not a measurement of how each format performs for this account specifically. We keep one median per account, not one per format per account, so the second thing is not something this data can tell you.

Best tweets

  • Sep 20, 20254.3x their median

    “Plants give off light. Shrimp give off light. Literally everything that is alive emits light,” says Nirosha Murugan. And what about us humans? To find out, listen to "The Spark of Life" here: https://t.co/VQZBF4DCT4 @msahsorin https://t.co/SgUXKdBve8

    2742118K viewsView on X
  • Aug 3, 20253.3x their median

    Charity Woodrum is an astronomer who studies why some galaxies burn bright and others sputter out. In the midst of an unthinkable grief in her life, she discovers something in the sky: a new kind of light that would guide her path forward. Listen here: https://t.co/lFAnSM5O0v https://t.co/qILpXgYuRW

    183324.2K viewsView on X
  • Jul 23, 20253.3x their median

    So excited and honored that we’ve been named one of Time Magazine’s Best Podcasts of All Time. Only four science podcasts made the cut, so we’re pretty hyped about it. 😇 Read what Time wrote about us here: https://t.co/keE01GtqzV https://t.co/KFYR47tPOr

    203213.6K viewsView on X
  • Aug 8, 20253.0x their median

    We're so excited!! This week, we got to see our show promoted on a TIMES SQUARE BILLBOARD thanks to @amazonmusic promoting our special summer series: Swimming with Shadows. Go listen to it on Amazon Music here: https://t.co/wY18sc9X6y @PlayMorePods https://t.co/mTBpbaMMmv

    231003.5K viewsView on X
  • Dec 6, 202511x their median

    A year ago we brought you a show called Shell Game where a journalist named Evan Ratliff made an AI copy of himself. Now, Evan’s using AI to do more than just mimic himself — he’s starting a company staffed entirely by AI agents. Listen here: https://t.co/Dmr2dU5qGW https://t.co/s5dCN8FGbG

    152323.6K viewsView on X
  • Sep 15, 20252.3x their median

    The Golden Goose Awards go to scientific research that at first sounds trivial or laughable but then turns out to change the world. They’re having their 2025 Award Ceremony TOMORROW September 16 at 5:30 p.m. ET. You can livestream it here: https://t.co/otbYa2C8yQ @GoldGooseAward https://t.co/504t7JpSZk

    153002.9K viewsView on X
  • Oct 17, 20258.5x their median

    TikTok has radically changed the online world, but maybe not how you’d expect. This week, we look at how Facebook’s approach to free speech has evolved since Trump’s victory and how TikTok upended everything we see. Listen to “Content Warning” here: https://t.co/U9WHw1wQ65 https://t.co/C9cJnVDFCr

    110422.5K viewsView on X
  • Oct 24, 20257.5x their median

    Love it or hate it, the freedom to say obnoxious and subversive things is the quintessence of what makes America America. But our say-almost-anything approach to free speech is actually relatively recent, and you can trace it back to one guy. Listen here: https://t.co/ECEtS7HPEV https://t.co/kA9ySQ1uEa

    102302.5K viewsView on X
  • Sep 26, 20251.6x their median

    Over millions of years, human voices have evolved to hold startling power. These clouds of vibrating air carry crucial information about who we are. This week, we try to understand how we got our sonic fingerprint, and what happens when it’s taken away. https://t.co/VQZBF4DCT4 https://t.co/ILzqc1AeTW

    83112.7K viewsView on X
  • Aug 27, 20251.5x their median

    Can AI find lifesaving cures hidden in plain sight? Listen to “The Medical Matchmaking Machine” here: https://t.co/XhXox6Cmn7 https://t.co/OoQWz60AEi

    61412.7K viewsView on X

Ranked by total interactions across everything we have tracked for this account, which is a longer history than the 30-day window the rates above use. The multiple compares each post to this account's own median.

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Reading these numbers

A typical post picks up 2 interactions against 233K followers, an engagement rate of 0.001%. Posts are seen about 2.1K times each, and 0.094% of those impressions turn into an interaction. That is about 0.912% of the follower count, which is the gap between an audience on paper and an audience in a timeline. Posting runs at about 0.1 posts a day over the last 30 days, though only 10% of days saw any activity at all. Most posts go out around 17:00 UTC, and Friday is the busiest day of the week. Of the 3 posts sampled, 100% carry an image or video and 100% link out. The account's strongest tracked post pulled 34 interactions, about 4.3x its own typical post. Only 3 original posts have been captured so far, fewer than the 8 posts we want behind a median before treating it as settled. Read the figures above as an early measurement of this account, not as a finished profile of it.

What is Radiolab's engagement rate on X?
Radiolab (@Radiolab) has an engagement rate of 0.001%, based on the median interactions across 3 original posts from the last 30 days against 232,600 followers. Replies, reposts and quote-posts of other people are excluded from that sample.
Is that a good engagement rate?
At 0.001%, Radiolab sits below the 10th percentile of the 204,694 accounts in this comparison. Those comparison accounts are all large ones, because our scanning cadence is weighted towards big accounts, so this is a ranking among peers of similar scale rather than a ranking across X.
Does @Radiolab have real engagement?
There is not yet enough sample to rank this account against others of its size.
When does @Radiolab post?
Most posts go out around 17:00 UTC, and Friday is its busiest day, at roughly 0.1 posts per day across the measured window.

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