Mysterious, ultra low-frequency noises detected in Earth's atmosphere — and scientists can't explain them

[admin]

Solar-powered balloons detected strange rumblings at a height of 70,000 feet above the Earth's surface. Scientists can't identify them.

Mysterious, ultra low-frequency noises detected in Earth's atmosphere — and scientists can't explain them : Read more

 

[keithisco]

Sounds like a corollary to the HAARP experiments.