[Southack]

"The SETI Institute predicts that we'll detect an extraterrestrial transmission within twenty years." We shall see."

It's worth listening for, but my guess is that advanced civilizations will be using Gravity waves rather than EM waves.

[G32]

"It's worth listening for, but my guess is that advanced civilizations will be using Gravity waves rather than EM waves."

Why? Gravitons are billions of times weaker than photons and travel no faster than light.