About Explorehall
Explorehall is an independent online science museum about how things work. It is made by one developer in Seoul, South Korea, and is paid for by advertising.
What an exhibit is
Each exhibit is a 3D model that you can operate in the browser, together with a long article. The models are generated in code rather than downloaded from a model library, so their proportions follow the published design they represent. Where a model leaves something out, the article says what and why.
On most exhibits you can play and pause the motion, slow it down, look inside the casing, take the parts apart and show their names. The article underneath starts from something you have probably seen, explains the mechanism step by step, works through the numbers with the formulas written out, and ends with common questions, a short glossary and the sources that were checked.
Who it is for
The exhibits are written for a general audience aged 13 and over: curious adults and students from secondary school up. Teachers are welcome to show them in class on a projector or a shared screen; nothing needs to be installed and there is no sign-in. The articles keep school-level maths where they can and explain any term the first time it appears.
Galleries
- How It Works: everyday machines and natural processes, opened up and slowed down.
- Old Machines: devices such as typewriters and telegraph keys that you can operate on screen.
- Follow Along: knots, handwriting and other skills split into steps you can replay.
- Senses: exhibits about hearing and seeing.
- Walk-throughs: life-size 3D places that you walk around, from a field of dinosaurs to the inside of a cell.
How new exhibits are chosen
New exhibits come from questions people ask about everyday things, from requests sent by readers and teachers, and from machines whose workings are usually hidden behind a cover. An exhibit is added only when there is a published source for its dimensions and behaviour, so the model can be built to match.
Languages
All exhibits are available in English and Korean. Both versions carry the same numbers and sources; the Korean text is written for Korean readers rather than translated line by line.
Advertising
Ads appear in marked spaces in the article, never inside a model or its controls. Advertisers have no say over which exhibits are made or what the articles say, and no exhibit is sponsored.
Corrections
If you find a mistake, write to contact@explorehall.com with the page address and the sentence in question. Corrections are made on the page and the date of the change is shown at the top of the article.