> Have large ice sheets in the past forced/caused changes in human behavior Not human in this example, but they can be devastating to penguin populations: htt

> Have large ice sheets in the past forced/caused changes in human behavior Not human in this example, but they can be devastating to penguin populations: https://www.theguardian.com/world/2016/feb/13/150000-penguins-killed-after-giant-iceberg-renders-colony-landlocked https://www.theguardian.com/world/2016/feb/13/150000-penguin...