June 15 (UPI) -- As humans, we live out our lives on a planet that is constantly sweeping through a cosmic ocean littered with ancient debris from the formation of the solar system . For the most part, our world glides silently through space, shielded by Earth's thin atmosphere. Occasionally, however, the rest of the universe reminds us of its presence with stunning, visceral clarity. Residents along the Massachusetts-New Hampshire border were startled by a sudden sonic boom on the afternoon of