For more than 60 years, scientists have been scanning the skies for signs of intelligent life beyond Earth. Using powerful telescopes, they have searched for unusual radio signals, brief laser flashes ...

How could the principle of "radical mundanity" proposed by the Fermi paradox help explain why humans haven't found evidence of extraterrestrial technological civilizations (ETCs)? This is what a ...

Recent discoveries have sparked a wave of excitement and intrigue among scientists and the public alike, as evidence suggests the existence of ancient non-human artifacts on Earth. These findings, if ...

LaserSETI display at the Natural History Museum in London, UK. Image Credit: Eliot Gillum Could Life Exist Beyond Earth? This question holds universal appeal and has the power to revolutionize how we ...

We’re celebrating 180 years of Scientific American. Explore our legacy of discovery and look ahead to the future. In the late 1800s Italian astronomer Giovanni Schiaparelli pointed a telescope at Mars ...

For centuries, great thinkers have pondered why, given the hundreds of billions of planets in the galaxy, we have seen no compelling signs of intelligent life beyond Earth. Now, scientists are mulling ...