Sibling astronomers discover Martians are threatening to attack Earth, but no one believes them-until Martians land and nearly destroy all of New York City.Sibling astronomers discover Martians are threatening to attack Earth, but no one believes them-until Martians land and nearly destroy all of New York City.Sibling astronomers discover Martians are threatening to attack Earth, but no one believes them-until Martians land and nearly destroy all of New York City.