Just what are these weird sounds heard over Istanbul?
If you haven't heard of the phenomenon known as "sky trumpets", where have you been? The term refers to trumpet-like sounds which boom out of the sky - it's like something from a sci-fi film. This weird phenomenon has been documented across the globe - just Google it and you'll find plenty of videos!
This most recent video comes from Istanbul, where residents experienced the phenomena throughout the day and night of 30th December 2015. According to experts, these noises could simply be the earth's "natural radio transmissions." We think you'll agree though, they still sound pretty scary!