Physics in Nature Presentation: Sunflowers, (Magnetic) Cacti, and the Golden Ratio

          @misc{ scivideos_PIRSA:11080102,
            doi = {},
            url = {https://pirsa.org/11080102},
            author = {Thewalt, Eric},
            keywords = {},
            language = {en},
            title = {Physics in Nature Presentation: Sunflowers, (Magnetic) Cacti, and the Golden Ratio},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2011},
            month = {aug},
            note = {PIRSA:11080102 see, \url{https://scivideos.org/pirsa/11080102}}
          }