If you don't have one or are having trouble locating your bubble level, Android phones can actually use Google search to ...

A spirit level is a must if you want your home to have straight, even lines, but what is that bright-green liquid inside the bubbles? It's not just water.

When a bubble, or spirit, level is level, what does that mean relative to Earth? Pat French Longdon-upon-Tern, Shropshire, UK There is a well-known story of a gentleman who held that Earth was flat.