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Whether you want to call it a “Blood Moon”, “Harvest Moon” or a “Supermoon” ...the rare total Lunar Eclipse happening on September 27th hasn't happened in 32 years, and won't happen again for another 18 years. If you are on the west coast the eclipse will begin at 7:11 p.m. PDT Sunday evening and will last one hour and 12 minutes.

The drinking water provided for San Francisco and many nearby communities is among the purest in the world. Located high in the Sierras, more than 200 miles away, Hetch Hetchy reservoir holds most of this water which is fed by springtime snowmelt via the Tuolumne River. The system for delivering that water is almost entirely gravity fed, requiring almost no fossil fuel consumption to move water from the mountains to the tap. Take an exclusive tour with the San Francisco Public Utilities Commission (SFPUC) as they lead us through this unique system and address the current drought and how to conserve water.

What would it take for humans to travel to and live on Mars—and who is daring enough to do it? In this episode, we explore the Mars One project, which is planning human settlement on the red planet, and hear from scientists at NASA's Ames Research Center about adjusting to the Martian environment. We also meet some brave Bay Area residents who are hoping to make the journey.

Join Exploratorium scientists Paul Doherty and Isabel Hawkins for a live webcast as they share information about the Rosetta Mission, which is due to be "woken up" on January 20th, 2014. Rosetta is a spacecraft en route to Comet 67P/Churyumov-Gerasimenko, where it will make the most detailed study of a comet ever attempted.

Since 1969, the Exploratorium has set the standard for hands-on, inquiry-based education. See how our new Pier 15 home, with its new exhibits and expanded resources, is helping us achieve our mission: to change the way the world learns.

The Exploratorium is more than a science museum. It is the global leader in informal learning, having spawned 1000 participatory science centers around the world. An estimated 180 million people play with our creations in museums around the globe and online. The Exploratorium is made up of scientists, artists, teachers and tinkerers. It is a public laboratory where visitors are encouraged to ask questions, experiment, and ultimately see the world a little differently.

Edward O. Wilson has revolutionized science and inspired the public more often than any other living biologist. Now he is blending his pioneer work on ants with a new perspective on human development to propose a radical reframing of how evolution works. Dr. Wilson visited the Exploratorium recently and spoke to staff and a group of invited students.

Students really struggle with the metric system. TI staff educator Lori Lambertson tells us how she helps students get a handle on what the units really mean.

Staff educator Tory Brady performs a bit of theater, demonstrating the roles of the star players in the immune system.

Is a single gene, FOXP2, the secret to human speech? Researchers discuss the genetic underpinnings of speech and language.