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 ...

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 ...