6
A village nestled in the Turkish hills is home to an ongoing mystery that scientists are struggling to explain.
26
The futuristic aircraft can reach supersonic speeds without producing deafening sonic booms.
7
This incredible species of bird from the Amazon can belt out a call so loud that it can damage your eardrums.
8
The futuristic X-59 will be able to travel at supersonic speeds without producing a deafening sonic boom.
41
The deafening sounds, which have been heard in dozens of locations this year, remain unexplained.
3
Frank Swain uses an experimental system to convert electromagnetic signals in to audible sounds.