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WikiPedia: David Attenborough http://www.smh.com.au/articles/2003/03/24/10483545... http://cantic.bnc.cat/registres/CUCId/a10431263 http://data.rero.ch/02-A002950018 http://www.britannica.com/EBchecked/topic/42130/Si... http://www.clarealumni.com/s/845/file_lib/1/1/clar... http://findarticles.com/p/articles/mi_qn4161/is_20... http://www.newscientist.com/blogs/shortsharpscienc... http://www.youtube.com/watch?v=SvoJSlcIYmM http://catalogo.bne.es/uhtbin/authoritybrowse.cgi?... http://katalog.nsk.hr/F/?func=direct&doc_number=00...