Examine the sophisticated base 20 system developed by the ancient Maya, which included a value for zero.

2010 National Medal of Science Laureate for his pioneering and fundamental contributions in optimization theory and numerical analysis and for his dedication and sustained efforts in fostering diversity and excellence in mathematics and science education. Produced by Evolving Communications for the National Science & Technology Medals Foundation.

In the second season of the climate change series "Years of Living Dangerously," Jack Black explores the challenges facing Miami as global warming raises sea levels, causing inland as well as coastal flooding thanks to the porous limestone under the city. In this excerpt he talks about the outsize impact on poorer residents with Nicole Hernandez Hammer, the Southeast Advocacy Coordinator for Climate & Energy at the Union of Concerned Scientists. The series airs Wednesday evenings at 9 p.m. eastern time this fall. More: Years of Living Dangerously (National Geographic Channel): https://yearsoflivingdangerously.com/announcement/premiering-october-30-national-geographic-channel/ Union of Concerned Scientists: http://www.ucsusa.org/about/staff/staff/nicole-hernandez-hammer.html#.WBoQc-ErKL4 Dot Earth coverage: http://dotearth.blogs.nytimes.com/?s=%22years+of+living+dangerously%22+climate+geographic Posted for Dot Earth with permission

Nueva Latina and entrepreneur Laura Gomez talks about being a proud mejicana who emigrated to the US and achieved her dreams as a technology entrepreneur.

Stephen Hawking follows her research and she flies planes in her spare time but who is Sabrina Gonzalez Pasterski? Daily Planet finds out! Daily Planet airs weeknights at 7E/4P only on Discovery Canada! https://www.discovery.ca/Shows/Daily-Planet

Tabular Integration in Stand And Deliver

One mans journey from migrant worker to astronaut: José Hernández spent many a boyhood night with his eyes fixed on the heavens. Those stars would light a path to a dream for the young field hand, one José would someday see through to reality.