On a hot November day in the tropical forest of Arecibo, Puerto Rico, amongst the croaking of coquís, the message went out. Warbling audio crackled over loudspeakers—the audible result of the work of ...

A simulated “alien” signal sent by a Nasa orbiter circling Mars has finally been cracked after months by a father-daughter duo, revealing the cosmic coded message. Nasa collaborated with SETI ...

Speculative alien messages raise unsettling possibilities about cosmic survival, warning that advanced civilizations may leave behind silence, graves, or threats. 'Who gave you authority to drag us ...