Beetles are turning the Rocky Mountains into a Graveyard

This image is showing the impact of mountain pine beetles on a forest in Colorado. The images are showing the change over seven years, and the lack of forest can easily be seen by the brown color showing up where the area was once green.  This is useful in seeing what areas are affected, where it is traveling, and the rate that they are being destroyed at.  There are some areas that look to be unaffected as well. These could help bring focus for more studying to be done on those specific areas, to look if they could either be in danger or have an immunity to this beetle.