Global warming is all over the news, and rightly so, seeing as how it affects so many different parts of human life here on Earth. One of the latest issues to start making an appearance is the inevitable spread of bacteria and microbes to new locations. As temperatures change, people around the world are being exposed to diseases and illnesses that they never have been before.

Examples include bacteria-infected oysters off the coast of Alaska, an overgrown tick population carrying encephalitis in Sweden, and mosquitoes bringing malaria to villages that were previously out of reach way up on Mt. Kenya in Africa.

This sounds really scary, and it is, but at least we know what we're dealing with -- not new diseases, just old diseases in new places.