Poetic prediction 鈥淩ed sky at night, shepherds鈥� delight; red sky in the morning, shepherds鈥� warning鈥�. Putting aside the occupation of the observer, is there any truth in this adage? If so, why is it true? Richard Kubiak, Pen-y-cae-mawr, Monmouthshire, UK
Come clean What is the difference between shampoo and shower gel and, if so, what is it? Sam Wong, London, UK
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