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carlzimmer.com

https://carlzimmer.com· First analyzed 25 May 2026· Updated 25 May 2026
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carlzimmer.com
Desktop screenshot of carlzimmer.com
Mobile screenshot of carlzimmer.com
Mobile

Sponsored

Hosting Provider

Sucuri

IP Address

192.124.249.104

Site Location

🇺🇸 United Statesvia ip

Server Location

🇺🇸 Menifee, United States

ASN

AS30148

Organization

Sucuri

Server

Sucuri/Cloudproxy

CDN

Cloudflare

WAF

Cloudflare

Nameservers

ns1.mediatemple.net.ns2.mediatemple.net.

Performance

100

Core Web Vitals

Weight

First Contentful Paint
533 ms10%
Speed Index
693 ms10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
6 MB
41 requests

Image Optimization

Lazy LoadResponsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
Frontend
Styling
Bootstrap
CMS
WordPressv6.9.4
Infrastructure
Hosting
Sucuri
CDN
Cloudflare

Technology Stack

13 Technologies Detected

Plugins

5
Aw Yearly Category ArchivesBoldgrid GalleryAdd Search To MenuPost And Page Builder
WooCommerce

CSS Frameworks

2
Bootstrapv3.3.1
Tailwind CSS

Libraries

1
jQueryv3.7.1

UI Components

1
Owl Carousel

Other

1
Modernizr

Icon Libraries

1
Font Awesome

Fonts

1
Google Fonts

Security

1
Sucuri

SEO Analysis

C67/100
19
9
0
Meta Tags13/15
Content8/12
Headings6/8
Technical18/25
E-E-A-T0/7
Images6/7
Links2/5
URL5/5
Social3/5
Freshness0/4
Mobile3/4
Indexability3/3
C
carlzimmer.comcarlzimmer.com

Carl Zimmer, New York Times columnist and author of science books

Carl Zimmer is an award-winner New York Times columnist and the author of 13 books about science. His newest book is Air-Borne: The Hidden History of The Lif...

Description truncated.
Title Length65 chars

Recommended: 50-60 chars (~401px / 580px)

Description Length170 chars

Recommended: 120-160 chars

Issues (0)

    9 issues found

    Upgrade to view details

    Crawlability

    Sitemap

    Type: index

    8 URLs

    8 sub-sitemaps

    robots.txt

    2 rules

    Allows all crawlers

    Local SEO

    Local Search Readiness

    7/100
    Poor
    2 14 2

    This site doesn't appear to be a local business. Local SEO signals are optional for non-local websites.

    Sponsored

    AI & LLM Readiness

    D43/100
    Bot Access
    20/25
    Machine Read.
    11/25
    Schema Data
    0/25
    Citation
    12/25

    AI Bot Access

    14/14 accessible
    AI Search
    OAI-SearchBot
    PerplexityBot
    Claude-SearchBot
    Gemini-Deep-Research
    DuckAssistBot
    Training
    GPTBot
    ClaudeBot
    Google-Extended
    Meta-ExternalAgent
    Bytespiderinfo
    Amazonbot
    Applebot-Extended
    CCBotinfo
    Fetch
    ChatGPT-User

    Machine Readability

    llms.txt
    llms-full.txt
    Semantic HTML
    Heading Hierarchy
    navheader/footer
    Text ratio:3%
    Words:378
    Token eff.:Optimal
    Sections/1K:5.3
    Depth:2/5

    Structured Data

    No Schema

    Citation Readiness

    Opening Summary22w
    Descriptive Headingsavg 7w
    Canonical URL
    Open Graph2/3
    Twitter Card0/3
    Language Tag
    Publish Date
    Author Info
    Lists
    Tables
    TL;DR / Summary
    About Page Link
    Recommendations (9)
    AI readiness recommendation preview...
    Upgrade to view recommendations

    Sponsored

    Accessibility

    WCAG 2.1 Compliance

    Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.
    A
    82/100
    12
    Passed
    3
    Critical
    0
    Warnings
    Images & Alt Text
    20/20
    Checks if images have descriptive alt text for screen readers and visually impaired users.
    Semantic Structure
    15/20
    Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
    Forms & Inputs
    15/15
    Verifies form fields have labels, error messages are clear, and inputs are properly associated.
    Color & Contrast
    15/15
    Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.
    Keyboard & Focus
    11/15
    Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
    ARIA & Roles
    6/15
    Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.
    1 recommendation
    • •Accessibility recommendation preview...
    Upgrade to view recommendations

    Carbon Footprint

    SWDM v4 · Eco-Score

    Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.
    30/100
    F
    766 mg
    CO₂e / view
    6.0 MB
    Page Weight
    5%
    Cleaner Than
    New Visitor
    875 mg
    vs
    Returning (cached)
    438 mg
    Annual (10K/mo)
    91.9 kg
    Emission Segments
    Data Center
    171 mg
    Network
    184 mg
    Device
    411 mg
    Resource Breakdown
    JavaScript
    77.4 KB
    Images
    69.2 KB
    CSS
    5.9 MB
    Fonts
    3.0 KB
    HTML
    14.1 KB
    Green Hosting Not Verified
    Sucuri
    4 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    B

    Security Score

    71%Good
    Interactive

    HTTPS

    WAF

    65d

    Certificate Details

    Type

    Domain Validated (DV)

    Certificate Authority

    GoDaddy.com, Inc.

    Key Algorithm

    RSA (2048 bit)

    Signature

    SHA-256 with RSA

    TLS Version

    TLSv1.3

    HTTP Protocol

    HTTP/2+H3

    Valid From

    30.04.2026

    Valid Until

    29.07.2026

    OCSP Stapling

    Enabled

    Subject Alternative Names (2)

    www.carlzimmer.comcarlzimmer.com

    SHA-256 Fingerprint

    1A:97:04:AB:33:68:9B:26:34:B7:6F:4D:5E:E6:07:03:AE:02:D6:08...

    Top Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    age
    230945
    alt-svc
    h3=":443"; ma=86400, h3=":443"; ma=2592000, h3-29=":443"; ma...
    cache-control
    🟢 1 Month(public, max-age=2678400)
    cf-cache-status
    HIT
    cf-ray🇫🇷 Paris
    a010d3a4397fdf1e-CDG
    content-encoding
    ⚡ Brotli(br)
    Good Warning Issue

    Email Infrastructure

    Google Workspace

    Score

    45

    SPF
    DKIM
    DMARC

    MX Records (5)

    alt4.aspmx.l.google.com
    aspmx.l.google.com
    alt1.aspmx.l.google.com
    alt2.aspmx.l.google.com

    +1 more

    Domain Information

    carlzimmer.com

    Domain Age
    26y 1m

    Created

    25.04.2000

    Expires

    25.04.2031

    Last Updated

    16.07.2023

    Registrar

    Network Solutions, LLC

    DNSSEC
    Not Enabled

    Mobile Compatibility

    Viewport & Responsive Test

    Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.
    B
    77/100
    Mobile Friendly7 breakpoints
    Viewport Meta
    The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.
    Responsive Design
    Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.
    Touch Icons
    Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.
    Readable Font Size
    Base font size should be at least 16px on mobile to ensure text is readable without zooming.
    Relative Units
    Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.
    No H-Scroll Risk
    No elements wider than the viewport that would cause horizontal scrolling on mobile devices.
    Tap Targets OK
    Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.
    No Fixed Widths
    No elements with fixed pixel widths that could overflow on smaller screens and break the layout.
    Viewport
    width=device-width, initial-scale=1
    1 recommendation
    • •Mobile compatibility recommendation preview...
    Upgrade to view recommendations

    Typography & Readability

    EB Garamond + Helvetica

    WCAG Partial
    56/100
    Readability
    /30
    22/30

    18px · LH 1.50

    Hierarchy
    /20
    12/20

    1.22x ratio · ✓ H1→H6

    WCAG
    /25
    15/25

    3.29:1 min contrast

    Performance
    /25
    7/25

    4 fonts · 2 req

    Heading Font

    EB Garamond

    Serif22px

    Body Font

    Helvetica

    Sans18px

    Contrast Ratio

    3.29:1

    10 issues

    Reading Comfort

    ~36 CPL

    Narrow lines
    22px
    h1
    22px
    h2
    24px
    h3
    18px
    p
    Minor Second
    Scale

    ✅ Excellent readability: 18px body text is ideal for all devices.

    ✅ Optimal line spacing: 1.50 ratio (ideal range 1.4–1.6).

    ⚠️ Partial contrast: 10 elements below WCAG AA threshold (min 3.3:1).

    ✅ Perfect heading hierarchy: Sequential h1→h2→h3 with single H1 — ideal for SEO & accessibility.

    ⚠️ Weak hierarchy: Headlines should be ≥2x body size for clear visual structure.

    ⚠️ Missing font-display: swap — users may see invisible text while fonts load (FOIT).

    GGoogle FontsFlesch 66

    Color Palette

    9 unique colors
    13.7:1 AAA Light
    #ffffff
    Background· 15.399999999999999%
    #2b2e2e
    Other· 6.3%
    #040000
    Accent· 31.2%
    #240a02
    Primary· 19.6%
    #3c9897
    Primary· 9.8%
    #b0cbc4
    Secondary· 5.3%
    #5f534e
    Secondary· 4.6%
    #eff5ef
    Secondary· 4.4%

    Business & Marketing Stack

    1 Tools Detected

    Growing

    Behavior Analytics

    1
    Google AnalyticsFree

    User behavior and product analytics

    1

    Categories

    1

    Total Tools

    0

    Enterprise

    0

    Mid-Market

    Assessment: Growing marketing technology adoption

    Sponsored

    Scripts & Styles

    24 Resources

    14
    Scripts
    10
    Styles
    0
    Async
    0
    Defer

    Top Script Sources

    carlzimmer.com(14)

    Website Identity

    carlzimmer.com

    26 years old
    Location detected: 🇺🇸 United Statesvia ip
    Network Solutions, LLC📧 Google Workspaceen-US

    Sponsored

    Last analyzed: 25 May 2026 at 01:39

    Historical Analysis & Change Tracking