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

If humans ever receive a message from intelligent aliens, the biggest challenge may not be how far away they are, but how to communicate at all. Our nearest star system is more than four light-years ...

Science fiction stories about “alien” invaders are often political allegories for anxieties around immigration. Now, a ...

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 ...