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Scientists say we are experiencing the sixth mass extinction of species. All recent events were natural, while this one is caused by human action. Guests: Daniel Lahr, biologist and professor at the Institute of Biosciences at USP (IB) and Natalia Pasternak, professor and researcher at the Institute of Biomedical Sciences at USP (ICB) Follow the pages of Jornalismo TV Cultura on social media! Facebook: / jornalismotvcultura Twitter: / jornal_cultura Follow TV Cultura: Facebook: / tvcultura Twitter: / tvcultura Instagram: / tvcultura G+: https://plus.google.com/+tvcultura