The picture below shows a scene with a bear attacking Leonardo DiCaprio, who is playing Hugh Glass in the movie ' The Revenant'. How was the scene shot? Was the bear real?

[![enter image description here][1]][1]


[![enter image description here][2]][2]


  [1]: https://i.sstatic.net/V1cgu.jpg
  [2]: https://i.sstatic.net/M86Ct.jpg