While their experiences do not tell us what an alien would eat, they do show us that leaving Earth changes the way we eat.

And if aliens made of different stuff potentially possess consciousness, then why not minds made of silicon, metal, and ...

This strange sea alien can be as smart as humans ...

Spielberg’s hotly anticipated new movie gives fresh impetus to a dilemma that has long captured the imaginations of filmgoers, scientists and the great director himself ...