Add Yahoo as a preferred source to see more of our stories on Google. In 1947, Chuck Yeager flew the X-1, an experimental rocket plane, over Rogers Dry Lake in Southern California and broke the sound ...

Scientists are picking up on some strange sounds in the second layer of our atmosphere that they haven't heard anywhere else. The stratosphere is a relatively calm layer of Earth's atmosphere, rarely ...

Our atmosphere is filled with sounds that we cannot hear. The Earth hums; volcanoes howl, pop and whistle; storms roar menacingly; and meteors scream before exploding high above the ground. We are ...