India, Nov. 5 -- London (dpa) - Two scientists have turned their mathematical and engineering skills to the cruellest phenomenon of golf, offering an explanation for the mystery of why golf balls sometimes appear to fall into a hole only to pop straight back out again. According to a study by Stephen Hogan of the University of Bristol and Mate Antali of Szechenyi Istvan University, published on Wednesday in the journal Royal Society Open Science, the phenomenon applies not only to golf but also to mini golf. "Half of golf is fun, the other half is putting," the authors quote golf writer Peter Dobereiner as saying, illustrating the frustration of final putts on the green. They have now developed two mechanical explanations for what golfers c...