SETI's 1977 "Wow!" signal from deep space was even stronger than originally thought, but its source remains a complete mystery.

Could the first confirmed signal from an extraterrestrial source be less a hello than a goodbye? Astrophysicist David Kipping ...

Sound can be represented with both analog or digital audio signals. Analog audio signals use electrical voltage levels. Different types of transducers convert sound to electrical signals and ...

Researchers have been trying to explain this bizarre radio signal for decades. A new study hones in on its potential source. Reading time 3 minutes Nearly 50 years ago, astronomers searching the ...