“Tapping sounds” have been detected by sonar in the search area for the missing Titanic tourist submarine. A Canadian military surveillance aircraft detected underwater noises as a massive operation ...

The mysterious knocking sounds heard beneath the Atlantic Ocean that gave false hope that the Titan submersible and its occupants could be rescued has been revealed in a haunting new audio clip. After ...

A Chinese astronaut has reported hearing a strange “knocking” sound in space – and no one is quite sure what it is. The rest of this article is behind a paywall. Please sign in or subscribe to access ...