In the ‘Lost Forever’ series of articles, The Nature Nook will be looking at animal species that have become extinct in the past 500 years or so. Now, I should first point out that extinction is a perfectly natural process. It has always taken place throughout the history of life on Earth. Just as every individual that is born will die, every species that evolves will eventually become extinct. In fact, some 99.99% of all species that have ever lived on our planet are now extinct.