Rare ancient Chinese bronze works on display in US

When the mysterious people of China's Sanxingdui packed up and moved away 3,000 years ago, they left behind no written language and no indication of who they were, where they were going or why.

What they did leave behind was a gigantic cache of intricately fabricated, larger-than-life bronze artworks - each created at a time during which historians doubted technology even existed to make a bronze work on such a grand scale.

They also left several dozen elephant tusks, in an area where elephants were not believed to have been introduced yet.