This year, the animal kingdom was filled with triumph, loss and new discoveries. Here is a look at NPR's top animal stories ...

There are all sorts of things going on in the ocean's depths that we don't see. Like this Pacific sleeper shark at 4,600 feet ...

The world’s coal use is expected to reach a new high of 8.7bn tonnes this year, according to the International Energy Agency (IEA).

While I floated and peered down through my dive mask, a wave splashed over the back of my head and I realized I'd lost track ...