Sandy was particularly destructive because it was prevented from moving back out to sea by a "blocking pattern" associated with the jet stream. There's debate about this, but one recent study suggested that melting sea ice in the Arctic may lead to such blocking.

Photographs are still being taken but aren't being shown. There's one of a skeleton bound at the wrists with pants still around its ankles; if it was a woman, she was likely raped; if it was a man, he was possibly castrated.

It really is quite remarkable that Darfur has become a household name. I am gratified that's the case.

While Americans have heard of Darfur and think we should be doing more there, they aren't actually angry at the president about inaction

I have often tried to tell the story of a place through people there.

It’s time for a 21st-century abolitionist movement in the U.S and around the world.

The greatest threat to extremism isn't drones firing missiles, but girls reading books.