https://www.huffingtonpost.com/entry/stephen-hawking-dead-obituary_us_55e9fa97e4b03784e275e7c1?slideshow=true#gallery/55ad2c02e4b0caf721b3552b/6 http://www.catorze.cat/noticia/5027/stephen/hawking/futur/espai http://www.bbc.com/news/uk-43396627
