A hoax 'alien invasion' alert in Brazil caused panic and amusement, revealing vulnerabilities in emergency systems.

Steven Spielberg's Disclosure Day features ties to real-life accounts, widely-held beliefs, and known conspiracies regarding extraterrestrials.

Aliens are real. Or maybe not. The possibility of mystical beings watching over us or even walking among us is not just the ramblings of the fringe and Reddit users, but a key political and societal ...