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Guide · how to read

bridge42worlds in five minutes

Every day, fresh science from arXiv becomes text anyone can read. Here's how it all works — before you dive in.

What this is

Today's science — in plain words

Every day arXiv — the largest open library of new science — publishes hundreds of papers. We take their full text, hand it to an AI, and ask for one honest thing: explain it clearly. Not shorter, not louder — just clear.

Every article comes out in several languages and at four depths. All free, non-commercial, forever. We adapt a paper only when its license allows it.

The core idea

One paper — four depths

Not "short" and "full", but a ladder. Start wherever you're comfortable and go deeper if it grabs you. The depth switch sits at the top of every article.

Simple simple

For a first encounter.

When the topic is new and you want to grasp the essence without jargon. Any jargon here is always spelled out.

Popular popular

Once science already draws you in.

A lively account with intuition and imagery. The default level — every article opens here.

Advanced advanced

With formulas and the story of the discovery.

Closest to the original. For those who want depth and aren't afraid of math.

Mini mini

Just the gist in 10 seconds.

One thought, like a post in a feed. To decide whether to read on.

simplerdeeper

Site map

The menu up top

Left to right — from the feed to a living map of knowledge. The logo always brings you home.

main

A feed of articles by day. An endless stream grouped by date — like a news feed for science.

tags

Concepts. Topics in physics (black holes, dark matter…). Click for every article on the topic plus its explanation.

laws

Laws and principles. The "house of formulas" — laws, theorems, effects. A formula is only a rendering; the meaning is in the text.

scientists

Scientists. The great minds behind the discoveries — with a biography and related topics.

sections

arXiv sections. Cosmology, exoplanets, high-energy physics… — a filter by field.

authors

Authors. Researchers who publish on arXiv. An A–Z index, with tag chips beside each name.

graph

The knowledge graph. Tags ⇄ laws ⇄ scientists and all their links. You can wander through knowledge, not just read it.

theory

Labs. Interactive "benches": the Doppler effect, a heat engine, a gas, a kettle — turn the parameters with your own hands.

Favorites. Articles you've marked with a heart, gathered in one place.

Languages

Science in your language

The language switch is in the row under the menu. Russian is the source language; the rest are prepared by AI.

RUРусскийsource language
ENEnglishtranslation
ESEspañoltranslation
ARالعربيةtranslation · right-to-left
The Arabic version is complete, with a right-to-left (RTL) layout: the same frontier science, in the same plain words. The architecture doesn't cap the number of languages — a new one is added without rewriting the site.

How to search

Three ways to find what you need

The 🔍 button in the header. Plain text searches articles, and three prefixes go straight to the point:

# tag @ author ! scientist

For example, #black_hole — articles on the topic, @Hawking — by author, !Einstein — linked to a scientist. Next to it, the 📅 Calendar: year → month → day — jump back to any date. And the sections filter narrows the feed to the arXiv fields you want.

The special part

Wander through knowledge, don't just read it

Every article links to topics; topics link to laws and scientists; scientists link back to topics. It's one knowledge graph. On any tag, law, or scientist page there's a mini-map of its surroundings — with a depth dial + / −. And on the graph page — the whole map at once, with filters and search across all three types.

The practical point: you came for one article about neutron stars — and left understanding how they connect to general relativity, to the effect that describes it, and to the people who discovered it.

Nice things to know along the way

On the way

Dark / light themeToggles and remembers — read whichever way is easy on the eyes.
The "i" by the logoA short intro to the site — opens on click.
Reading timeEvery article has an honest estimate of how long it takes.
Images from the paperReal figures and plots from the PDF, with captions, plus an AI cover.
Heart and feedbackMark an article or leave a short note — no sign-up.
"Next article"The button at the bottom takes you onward, not back to the feed.
bridge42worlds science in plain words · for everyone · free