Steven Spielberg’s alien oeuvre has some enduring morals. Don’t trust the government. Your loved ones may not understand you.

When we imagine alien life, we picture monsters, insects, or tentacles—but what if the most realistic aliens are human-like? Evolution tends to solve the same problems with similar designs, and ...

Scientists are listening in on sperm whale conversations and studying Earth's strangest microbes to prepare humanity for first contact with extraterrestrial life.