Because some people don't like their metal heavy, Boeing has created the lightest metal structure known to date. It's 99.99% air and consists of a lattice of hollow metal polymer tubes. No word how much it costs to manufacture, buy my guess is way too much to make it practical for anything but bragging about until they can get the cost down.
Hit the jump for a video about it.
Thanks to Dougie, who told me he had the world's lightest material in his hand but when I went to touch it all i felt was a sweaty palm and then he laughed at me. And to Jessica, who is nice enough not to trick me like that.