Stand on the beach overlooking Half Moon Bay, and the sound you’re most likely to hear is of waves crashing against the rocks. But when Roger Bland climbed up there, he wanted to hear what was underneath those waves.
Maybe you've just seen The Bourne Legacy and have nagging feeling that you're being watched at all times. Maybe you related a little too much to Close Encounters of the Third Kind. So if you see low-flying helicopters crisscrossing the skies this week, you might think the government is after you, or that the aliens have finally arrived. But the more likely explanation is that you've caught a glimpse of the federal effort to measure "naturally occurring background radiation."