Why Bill and Melinda Gates think time and energy are global superpowers.

Bill and Melinda Gates released their annual letter. Get excited.

Bill and Melinda Gates were chatting with high schoolers when they were asked, "If you could have one superpower, what would it be?"

Their answers to that question may seem pretty simple (and even a little bit boring). But don't be fooled ... they were more clever than they seem.

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The world is changing. For many poorer countries, the change is actually for the better. And no, that doesn't have to mean that the "rich" countries become poor trying to help them out.

Watch John Green break down three of the big myths about poverty, and feel your hope for our global economic future grow.

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