On Koekohe Beach, just north of the small hamlet of Moeraki, there are a few dozen large, perfectly spherical boulders scattered along the tide line: the Moeraki Boulders . Tourists on the road between Christchurch and Dunedin stop for a while to stand around and on them and to take photographs. I drove up there today and took a few snaps myself. The boulders are unusual but not unique. There are several other sites in New Zealand where similar rocks occur, and, so I have read, they are found in other parts of the world. They are not always found at the seaside, and Moeraki boulders are sometimes unearthed several kilometres inland. They have been fairly extensively examined and the process by which they were formed is no great mystery, although their uniformity and large size has meant that over the years legends have accreted around them, in much the same way that calcium and carbonates accreted around some core to form the boulders themselves, millions of years ago. ...