scienceblog.com website review

3 files block the first paint until they finish downloading. Deferring or inlining them could save about 1.4 s.

16 images could be 1.8 MB smaller with modern formats (WebP or AVIF) and sizes that fit a phone screen. Google estimates it would make the page about 250 ms faster on a phone.

Your mobile performance score is 89 (desktop: 88). Pages that score under 90 lose visitors before the first paint.

About 307 KiB of JavaScript is downloaded but never used on this page.

Taboola costs a phone 109 ms of main-thread work and 363 KiB of downloads while your page loads. Loading it after the page is usable, or only on the pages that need it, takes that off the critical path.

8 third-party services load with your homepage (Google Tag Manager, Taboola and Cloudflare and others), adding 668 KiB and 233 ms of main-thread time.

Polyfills for old browsers add 25 KiB JavaScript that modern phones do not need. Google estimates it would make the page about 100 ms faster on a phone.

4 files are served with short cache lifetimes, so returning visitors download them again (23 KiB).

3 long tasks block the main thread while loading, the longest for 71 ms. During a long task the page ignores taps.

About 10 KiB of CSS is downloaded but never applied on this page.

Critical files load one after another instead of in parallel (3 chains). Preconnecting to key origins and preloading the hero image shortens the chain.

Scripts make the browser recalculate the layout repeatedly while the page loads, which wastes processor time on phones.

4 KiB could be saved by minifying JavaScript.

The first text or image appears after 3.0 s on a phone. Good is under 1.8 s.

Over the last 25 four-week periods to 2026-10-03, real Chrome visitors' tap response (inp) went from 90 ms to 160 ms at the 75th percentile (Chrome UX Report (opens in a new tab) history).

The page becomes fully interactive after 6.8 s. Good is under 3.8 s.

Your largest element takes 3.0 s to render on a phone. Google's threshold for “good” is 2.5 s. The largest element is the image.

2 images have no width and height attributes, so the layout jumps as each one loads.

Your homepage downloads 2.6 MB in 47 requests on a phone: images 1.9 MB (20), scripts 564 KiB (11) and fonts 105 KiB (4). Under 2 MB keeps phones on slow connections fast.

7 images (527 KiB) are JPEG, PNG or GIF. The same pictures as WebP or AVIF are usually much smaller at the same quality, and every current browser shows them.

3 images are downloaded at several times the size a phone draws them, for example brush-teeth-608x421.png at 608 px wide, shown at 112 px. Resized copies would save about 240 KiB.

By the Sustainable Web Design model, a visit to your homepage emits about 0.73 g of CO₂e: 87.5 kg a year at 10,000 visits a month. It scales with page weight, so every byte cut lowers it.

5 text elements don't have enough contrast against the background to read easily, especially outdoors on a phone.

Headings skip levels (h1 → h3 and h2 → h5), which makes the page harder to scan with a screen reader.

Open Graph is missing og:description, so shared links fall back to guesses.

The homepage links to 80 pages on scienceblog.com and 0 external pages.

https://scienceblog.com/newsletter, https://scienceblog.com/category/health-med, https://scienceblog.com/category/brain-behave, https://scienceblog.com/category/techengineering, https://scienceblog.com/category/earth-energy-environment and https://scienceblog.com/category/lifenonhumans and 5 others have no meta description, so Google writes the search snippet from whatever text it finds.

https://scienceblog.com/newsletter has under 150 words in the HTML. Thin pages rarely rank; if the text loads with JavaScript, crawlers that don't run it see even less.

We fetched 15 pages linked from your homepage (of 54 found) and read each the way a search engine does.

No testimonials, customer logos, ratings or customer counts on the homepage: nothing tells a new visitor that others already trust you.

No phone number or email link on the homepage, so ready-to-buy visitors have one fewer way to reach you.

No guarantee or risk reducer (money-back, free trial, no credit card) is mentioned, which is often what tips a hesitant visitor.

The homepage carries about 924 words of visible text.

Before a visitor clicks anything, the page loads Criteo, Google Ads, Google Analytics, Google Tag Manager and Taboola (measured from a US location before any click). No consent tool was detected. Visitors from the EU, UK and several US states must be asked first.

Opening the homepage sets 3 cookies (measured from a US location before any click).

No known cookie consent tool loads with the page. Some sites build their own banner, and some only show one to visitors from the EU.

Loading the homepage contacts 13 hosts run by other companies (fonts, scripts, analytics, ads), each of which sees the visitor's IP address.