The first unmistakable signal from another intelligence may not be a cheerful greeting. A growing group of researchers is ...

Explore how astronomers aim to identify signs of alien life by analysing the atmospheres of distant exoplanets through ...

We live in a very exciting time: answers to some of the oldest questions humanity has conceived are within our grasp.

For this installment of "From the Archives," we answer a reader question about the monk parakeets and grackles in Austin.

In 1965, twelve American military personnel were allegedly selected for the most secret mission in U.S. history — a 10-year ...