Penguin Comic

http://science.nasa.gov/science-news/science-at-nasa/2004/05mar_arctic/

www.grist.org/article/penguins
http://www.penguinscience.com/clim_change_ms.php

http://www.grist.org/article/humans-spur-worst-extinctions-since-dinosaurs
http://www.well.com/~davidu/extinction.html