Recently it was brought to light that several species of Australian birds now driven into extinction might have been saved with today’s knowledge and a little human effort (http://www.scientificamerican.com/blog/post.cfm?id=six-australian-birds-declared-extin-2011-01-06) In fact, it is estimated that a quarter of the species on Earth may disappear forever within the next quarter century. These include many lesser known creatures, but also some very well known animals, such as black rhinoceros and the Siberian Tiger. (http://news.bbc.co.uk/2/hi/science/nature/2000325.stm).