Various other things

Here is a collection of other intersting things:

RISC-OS  – An effective, user friendly computer operating system
The Severn Bore  – A spectacular natural phenomenon
Walks on the south of Wokingham  – Scenery and natural history under threat
The Rod-Stone-Fortnight system  – A quirky (unofficial) British system of units
Trees cocooned by caterpillars – Something you wouldn't believe if you hadn't seen it