The not too-distant future of user interfaces

Watch this and tell me if you agree with John Underkoffler's suggestion that this type of wild user-interface will be possible with home computers in five years.

I say yes, even as I grasp to fathom all the possibilities.

Photos That Changed the World

One of my dreams in life is to be able to attend a TED conference, where the brightest -- and often the least known -- minds in the world gather to share ideas that make the world a better place.

TED.com is a treasure trove of short video presentations from previous conferences, and one released this month is titled "Photos That Changed the World." Jonathan Klein of Getty Images discusses some iconic photographs as well as some I had never seen before that remind you quickly how much power superb photographs contain.

Some of these images aren't for the faint of heart, but neither are some of the world's challenges.