Exclusive debut: Hear Imagine Dragons' 'The Unknown'

USA TODAY

Today only, hear The Unknown, a new song from Imagine Dragons, exclusively at USA TODAY. The song a bonus track on the deluxe edition of the band's new album, Smoke + Mirrors, out Tuesday.

"The Unknown is a song about questioning the future, and about my grandfather, who passed away years ago," says singer Dan Reynolds. "He was one of the most humble, funny and hardworking men I've ever known."

The special edition of Smoke + Mirrors, Imagine Dragons' second album, includes four bonus tracks, and different cover art. In addition to The Unknown, extra songs are Thief,Second Chances and Release. The deluxe edition is sold only at Target.

The Las Vegas band's first album, Night Visions, released in 2012, has been certified double-platinum (more than 2 million sold) in the USA.

Recently, the members of Imagine Dragons participated in a chat on USA TODAY Life's Facebook page and received more than 1,000 questions from fans. Read about it here: