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
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%.
Show the percentile table
| Percentile | Engagement rate |
|---|---|
| 10th percentile | 0.004% |
| 25th percentile | 0.024% |
| 50th percentile | 0.143% |
| 75th percentile | 0.677% |
| 90th percentile | 2.55% |
| 99th percentile | 82.4% |
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.
Show engagement by hour posted, utc as a table
| Hour (UTC) | Vs author median | Posts |
|---|---|---|
| 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 UTC | 0% | 116K |
| 22:00 UTC | -2% | 100K |
| 23:00 UTC | -1% | 90K |
Show engagement by day of week as a table
| Day | Vs author median | Posts |
|---|---|---|
| Sunday | +5% | 393K |
| Monday | +1% | 483K |
| Tuesday | -2% | 520K |
| Wednesday | -3% | 472K |
| Thursday | -2% | 430K |
| Friday | -3% | 447K |
| Saturday | +2% | 393K |
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.
| Format | This account | Catalog effect | 95% interval | Accounts behind it |
|---|---|---|---|---|
| Image or video | 100% of posts | +111% | +108% to +115% | 34K |
| Outbound link | 100% 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
- 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
- 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
- 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
- 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
- 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
- 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
- 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
- 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
- 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
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.