As incredible as Back to the Future made time travel look, the way the filmmakers created that vision behind the scenes is even cooler.

These little-known Titanic facts are sure to surprise you--and give you the chills.

This newly authenticated photograph of Wild West outlaw Billy the Kid, bought for $2 at an antique shop, could be worth around $5 million.

Plus: the world's most dangerous walkway has reopened, creepy vintage dolls to haunt your dreams, the year's best wildlife photography, and more.

These ancient maps, whether etched into brass or drawn onto deerskin, present a vivid, beautiful worldview that modern maps can't provide.

Plus the best of autumn around the world, the faces of New York's roughest neighborhood, the globe's most terrifying skywalks, and more.

Plus: The abandoned side of Paris you've never seen, the strange ways of the Deep South, the haunting Chinese village reclaimed by nature.

Google's self-driving car and XEROX's self-destructing chip may both soon be here, plus the rest of this week's top tech news.

The just discovered species that changes the story of evolution, plus unbelievable photos of Japan's devastating flood and Iceland's stunning volcanoes.

Yes, literally 100% effective, plus Obamacare's new provisions for transgender people, and the rest of this week's top health/medicine news.

North Korean propaganda: outlandish glimpses at what one of the most dangerous countries on earth thinks about us--and claims to have in store for us.