Some Highlights from TED

You need to know about TED, if you don't already. TED stands for "Technology, Entertainment and Design" and is essentially an annual conference renowned for the quality of its speakers and presentations.

You can't go to TED talks unless you're remarkably eminent - a former US president or Nobel Prizewinner, say - but it is to TED's eternal credit that you can watch hours and hours of video recordings of talks online, for free.

The subject matter is eclectic, to say the least, but the one thing that all the talks have in common is that they are utterly fascinating. It's kind of tricky to pick highlights, and far easier to just dive in and spend hours clicking around. But nevertheless, here are three talks from TED that particularly appealed to me.