Add Yahoo as a preferred source to see more of our stories on Google. Scientists have searched the skies for alien radio signals for more than 60 years, but all they’ve heard so far is what Search for ...

Alien civilisations may have just been given a 400,000-fold boost in their chances of finding humans, according to a new ...

Scientists may have discovered how extraterrestrial civilizations could actually detect and find Earth.

Alien civilizations, cosmic signals, and megastructures drive this deep search for intelligent life beyond Earth. The video ...

Where are all the aliens? No, I don’t mean microbes on Mars or creatures swimming beneath the ice crusts of Europa or Enceladus, but honest-to-God intelligent aliens, capable of space travel? The ...

Loading external pages may require significantly more data usage than loading CBC Lite story pages. The only place we know for certain that life exists is here on Earth. But when we look out at the ...