Riddle I am liquid, up or down. My banks are wooded, peeling in the sun. You don't see my face, no wrinkle shows or lines for sight. I am a page of light then turn to dark. Some colour me Ad Majorem Dei Gloria - I cast a stain upon their floor and colour their garden through a closed door. Should physics lose its head I'd flow and puddle like an undisciplined dog. Andrew Burke