Cup and ring mark stone: Nasa suggests such rock carvings could explain how we communicate with extraterrestrials Nasa has released a new book that suggests ancient rock carvings found across the ...

The first unmistakable signal from another intelligence may not be a cheerful greeting. A growing group of researchers is arguing that our inaugural contact is more likely to be a distress call, the ...

For decades, the search for extraterrestrial intelligence has been defined more by silence than discovery, but that balance may be starting to shift. As new telescopes, algorithms, and theoretical ...