Spend a few minutes and click over to watch this BBC piece about the discovery of bear bones found inside an underwater cave in Mexico. Scientists think that the bears could date back to the last ice age and would have drowned in their caves after rising temperatures brought on an accompanying rise in sea level.
It's a good reminder of how much things can change in nature. Those bears never imagined for a minute that their homes would be flooded by rising seas, they just went about their bear business until one day they couldn't get out of their cave and they drowned. There are some lessons to be learned there. The average height above sea level in Miami is just six feet.