Carl Zimmer

Carl Zimmer

@carlzimmer

@nytimes columnist, author https://carlzimmer.com/ & @[email protected] & https://www.facebook.com/unsupportedbrowser & https://bsky.app/profile/carlzi…

Connecticut Joined 2008-03-05 Date of Analysis: Dec 16, 2025

285,852

Followers

2,384

Following

65,220

Tweets

832.2

Avg Engagement

5,865

Listed

No

Verified

Account Overview

What This Report Covers

This comprehensive analysis examines @carlzimmer's Twitter/X presence across multiple dimensions. We analyze tweet content, engagement patterns, audience demographics, posting habits, and network connections to provide actionable insights about this account's social media strategy and influence.

Account Classification

  • Account Size: Macro Influencer (100K+)
  • Account Age:2008-03-05
  • Verification:No
  • Location:Connecticut

Data Summary

  • Tweets Analyzed:3,223
  • Avg Likes per Tweet:20.1
  • Avg Retweets per Tweet:812.2
  • Followers Analyzed:50,000

Engagement Analysis

Based on 3,223 tweets

Zimmer's tweets typically receive a high number of likes and retweets, indicating strong audience interaction. His posts often spark discussions and shareable content.

20.1

Avg Likes/Tweet

812.2

Avg Retweets/Tweet

64,691

Total Likes

2,617,577

Total Retweets

Engagement Quality Analysis

Median-based metrics that resist fake virality and outliers.

0

Median Likes

27

Median Retweets

285

75th Percentile

103,699

Top Tweet

2.91

Engagement per 1K Followers

Normalized influence metric

Viral Spikes

Engagement Pattern

Few posts get most engagement

Posting Behavior

Content style and format preferences

Curator

Amplifies others content frequently

29.6%

Original

10.0%

Replies

57.5%

Retweets

2.9%

Quotes

0.0%

Threads

0.5%

With Media

46.0%

With Links

6.4%

With #Tags

72.8%

With @Mentions

2.6%

With Emojis

131

Avg Length

Audience Reaction Profile

Interactive

Balances broadcasting with conversation

0.34

Reply/Original Ratio

0.05

Quote/RT Ratio

Posting Rhythm

Highly Bursty

Posts in concentrated bursts

77.3%

Weekday Posts

22.7%

Weekend Posts

Top Hashtags

#covid19 (47) #omicron (14) #ida (8) #longcovid (7) #covid (7) #sarscov2 (6) #nasawebb (5) #monkeypox (4) #ukraine (4) #ian (3)

Most Mentioned

@nytimes (88) @carlzimmer (54) @erictopol (33) @rebeccadrobbins (24) @cliffordlevy (21) @ap (21) @oneunderscore__ (19) @helenbranswell (19) @ashtonpittman (18) @emilyanthes (17)

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Content Strategy Analysis

Based on 3,223 tweets

Content Type Distribution

Content Breakdown

Original Tweets 955 (30%)
Replies 321 (10%)
Retweets 1,852 (57%)
Quote Tweets 95 (3%)

What This Reveals About Their Strategy

This is a content-creator focused account that primarily shares original thoughts, ideas, and media. With original content dominating their feed, they position themselves as a source of new information rather than a curator. This strategy works well for establishing thought leadership.

The 1,852 retweets (57% of activity) show they also amplify content from others, which helps build relationships with other accounts and provides value to followers by surfacing relevant content.

Posting Patterns & Optimal Timing

Based on 3,223 tweets

Engagement by Hour (UTC)

Posting Frequency Over Time

Timing Insights

Understanding when an account posts and when their audience is most responsive provides valuable competitive intelligence. The charts above show when this account's content receives the most engagement, which often correlates with when their specific audience is most active on the platform.

Peak posting times vary significantly based on an account's audience demographics, timezone distribution, and content type. Accounts with global audiences often see engagement spread across multiple time windows, while those with regional focus may have more concentrated peaks.

Audience Demographics

Based on 50,000 followers

His audience includes science enthusiasts, educators, and general readers interested in health and biology. The content is accessible and informative, appealing to a broad demographic.

Average

Audience Quality

22.0%

Suspicion Index

19.1%

Low-Quality %

132

Median Reach

Audience Quality Signals

Lower percentages indicate healthier, more authentic followers.

28.7%

Empty Bio

14.8%

<10 Tweets

28.0%

Mass Following (>2K)

0.0%

New (<90 days)

41.0%

Low Ratio (<0.1)

0.0%

New (<180 days)

75.2%

No URL

9.6%

<3 Tweets

Free Mode Analysis: These quality metrics use heuristic signals (empty bios, low tweets, suspicious ratios). For ML-powered bot detection with 95%+ accuracy, use our dedicated tool.

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Follower Reach & Influence

This account's followers have their own audiences, creating potential for secondary amplification.

222,462,198

Total Potential Reach

132

Median Follower Reach

529

75th Percentile Reach

16.2%

>1K followers

3.0%

>10K followers

0.8%

>50K followers

0.4%

>100K followers

Creator vs Consumer Split

Classification based on tweet activity: Creators (>100 tweets), Consumers (10-100 tweets), Dormant (<10 tweets).

69.2%

Creators

34,586 accounts

16.0%

Consumers

8,023 accounts

14.8%

Dormant

7,391 accounts

574

Verified Followers

1.15% of total

19.2%

Professional Bios

founder, dev, analyst, etc.

0.15

Median Follow Ratio

follower/following

Follower Influence Distribution

How many followers do their followers have?

Follower Account Age

How long have followers been on Twitter?

Geographic Distribution

Top locations where followers are based (from those who share location data):

New York, NY (446) United States (426) Washington, DC (410) Boston, MA (306) Los Angeles, CA (294) San Francisco, CA (266) London, England (238) California, USA (225) Chicago, IL (218) Seattle, WA (209)

923

Verified Followers

0.91% of total

10,540

Protected Accounts

10.44% of total

9 years

Avg Account Age

of their followers

Notable Followers (By Influence)

Top accounts following this user, sorted by their follower count:

Username Followers Profession Interests
@nytimes 55,080,745 News Organization News, Tips, Share
@JohnCena 14,102,315 Wrestler Wrestling, Motivation, Self-promotion
@rahulkanwal 4,471,329 Journalist News, Director, Anchor
@revistasuper 3,972,830 Journalist Science, Knowledge, Curiosity
@NateSilver538 3,443,862 Statistician Sports, Politics, Food
@jaketapper 3,163,902 Journalist News, Politics, Journalism
@cmrondon 2,917,321 Journalist journalism, radio, television
@benlandis 2,849,271 - -
@DanaPerino 2,358,435 News Anchor Fox News, Politics, News
@NaturePortfolio 2,281,710 Science Publishing science, research, community

Top Keywords in Follower Bios

science (6,274) phd (3,831) health (2,834) sheher (2,826) research (2,565) views (2,437) student (2,432) writer (2,139) scientist (2,000) university (1,980)

Top Hashtags in Follower Bios

#scicomm (393) #blm (304) #resist (269) #science (239) #blacklivesmatter (211) #ai (139) #39canimals (134) #firstgen (97) #rstats (91) #womeninstem (84)

69,460

Followers With Bio

31,537

Followers Without Bio

68.77%

% With Bio

31.23%

% Without Bio

Why Audience Demographics Matter

Understanding who follows an account reveals the type of influence they hold. Accounts followed primarily by users with few followers indicate broad, mainstream appeal. Those with many high-follower followers have greater potential for content amplification through secondary sharing.

Account age distribution also tells a story: a follower base with many new accounts might indicate recent viral growth, while established followers suggest long-term, stable influence. Geographic data helps understand the cultural context and timezone spread of the audience.

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Viral Tweets

Top 5 by likes+RTs from 3,223 analyzed

317,452

Combined Engagement

0

Total Likes

317,452

Total Retweets

63,490

Avg per Tweet

Key Metrics for Viral Tweets

0%

With Media

20%

With Hashtags

100%

With @Mentions

0%

With Links

Topical Analysis:

Science Communication Public Health Biology Vaccination Pandemic Health Reporting

Key Insights & Takeaways

Zimmer frequently highlights important scientific developments and public health issues. He uses his platform to share in-depth analyses and reports on topics like vaccination and pandemic impacts. His content often includes links to articles and reports, encouraging further reading and engagement.

Strengths

  • + Strong engagement rates above platform average
  • + Established follower base of 285,852
  • + Strong original content creation
  • + Active presence with consistent posting

Opportunities

  • ~ Optimize posting times for peak engagement windows
  • ~ Analyze top-performing content for replicable patterns
  • ~ Leverage geographic concentration for targeted content
  • ~ Explore collaboration potential with followed accounts

Summary

This analysis of @carlzimmer reveals an well-established Twitter presence with 285,852 followers. The account demonstrates a content-creator strategy, averaging 832.2 engagements per tweet. Key strengths include consistent posting and an engaged audience, with opportunities to further optimize timing and content strategy based on the patterns identified in this report.

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About This Analysis: This analysis is based on a snapshot of followers, following, and recent tweets. It evaluates structure, quality, and behavior, not historical growth. Metrics like growth rate, momentum, churn, or spike analysis require time-series data which is not available from a single snapshot.

Data collected and analyzed by twtData | Analysis date: Dec 16, 2025