The machines are built from autonomous modules that can be snapped together in a variety of forms ...

Humans have practiced head shaping for tens of thousands of years, and anthropologists are beginning to uncover clues as to ...

Are aliens real? The question has animated conspiracy theories for decades and enthralled at least one former president of the United States. In a recent interview, Barack Obama became the first ...

Assuming intelligent aliens know how to harvest energy from stars, would humanity be able to spot these high-level structures?