... scientists, however, made their observations miles away from the scene of the explosion. The work of preparation for the big bang has taken nearly four , months. The holes, bored from the top to the bottom of the quarry, were zl6lt. deep—the deepest ...

... from damage. A fresh-water canal running on the African side was diverted for over half a mile. On the day fixed for the big bang a military cordon was drawn round the place, and no one was allowed vithin six miles. The charge used for blowing up the ...