World is just a big apple waiting to be cored, according to Dr. T. F. Gaskell, shown at right handling a globe in his London office. The chief physicist for the British Petroleum Co. plans to drill a hole 10 miles deep, far outstripping man's deepest penetration of his planet to date. Painting, left, depicts the drill which will be used. Dr. Gaskell believes it may be possible eventually to drill all the way to the earth's center, thought to be a mass of molten iron.