Mechanical Watch

About this site

Bartosz Ciechanowski's legendary explainer, with every spring, gear and escapement rendered as a 3D model you can drag and play with. The best kind of nerd snipe.

When to open it

Set aside a while: this one easily runs past 15 minutes. It works on phones as well as computers, and it's silent, so it's safe at work or in class. Best for learning and engineering nerds.

Also in

• On your phone
• Bored at school
• A long afternoon