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 ...

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 ...

In 2003, China’s first astronaut reported hearing an unexplained “knocking” sound while in space, a noise that eerily resembled someone knocking from outside. Despite more than two decades of ...