Rock from the island of Ailsa Craig is used to make curling stones used the world over, from New Zealand to Korea and Canada. Starting at sea on a rather choppy day, Sandy McCracken – who isn’t a good sailor! - tells the story from a scenic island to a busy factory and eventually on the ice at a curling rink. Next a riddle. What gift costs nothing but is priceless? As Emma Baker discovers, donating blood can take just minutes but make the difference between life and death.
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