On a headland a mile south of Treen, in Cornwall, England, on the edge of the cliffs overlooking the English Channel, is a famous Rocking Stone. Despite weighing 80 tons, the rock is so finely balanced on its base that a child can rock it back and forth by applying only slight pressure. Known as Logan's Rock – from the Cornish word 'loging' meaning rocking – it is one of many such balancing rocks found in the county.
Claire's tests came out fine. Thanks to those who emailed.