Over a year ago, we received a signal from Mars—an encoded message from Europe’s Martian orbiter, picked up by three observatories on Earth. The contents of this simulated alien message, crafted by an ...

Harvard scientist Avi Loeb wants to send a message to the interstellar object, which he claims could be an alien spacecraft that has come to probe Earth and the other planets. He has suggested sending ...

What would happen if aliens contacted us? It's a longstanding question that now has at least a partial answer after a transmission designed to mimic correspondence from an extraterrestrial ...