The unknown crackling could be the sound of distant thunderstorms, falling meteors, or turbulence. Listen to the sounds a balloon hears 12 miles above Earth: from ocean waves to volcanic eruptions.

17 infrasound stations in the CTBTO’s network detected the infrasonic waves from the meteor that broke up over Russia’s Ural mountains. Infrasonic waves from the meteor that broke up over Russia’s ...

Click image to see and hear multiple explosions of the fireball when it broke apart 12-15 miles high over Chelyabinsk, Russia on Feb. 15, 2013. This video scares me every time I see it. You've ...

Sometimes, the most important sounds are those that cannot be heard. Take infrasound—acoustic waves below the range of human hearing. Although nuclear weapons blasts, midair meteor explosions, ...

The balloons can take sensors twice as high as commercial jets can fly. Stratosphere, a layer of atmosphere above the Earth, is believed to be calm and quiet. But when scientists sent a solar-powered ...

Could the strange noises picked up by a U.S. graduate student’s balloon experiment really have come from outer space? Creative Commons Crop circles and UFO sightings weren’t getting their message ...

Eerie sounds from the edge of space were recorded for the first time in 50 years aboard a NASA student balloon experiment. Infrasound microphones captured the mysterious hisses and whistles 22 miles ...

For centuries, biologists believed giraffes were the mute giants of Africa’s plains and forests — silent sentinels gazing to the horizon. In recent years, however, new techniques and technologies have ...

Every time Morgan publishes a story, you’ll get an alert straight to your inbox! Enter your email By clicking “Sign up”, you agree to receive emails from ...

Infrasonic waves from the meteor that broke up over Russia's Ural mountains last week were the largest ever recorded by the CTBTO's International Monitoring System. Infrasound is low frequency sound ...

17 infrasound stations in the CTBTO’s network detected the infrasonic waves from the meteor that broke up over Russia’s Ural mountains. 17 infrasound stations in the CTBTO’s network detected the ...