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00:03:17
Artist Tim Hawkinson is celebrated for his idiosyncratic, imaginative artworks that re-purpose everyday materials in inventive sculptural constructions that simultaneously confound and delight. Hawkinson has collaborated with the Center for Art and Inquiry and the Studio for Public Spaces to create the third installment of our adventurous Over the Water series of large-scale artworks for the civic space at Pier 15. Bosun’s Bass is a tide-activated sound work inspired by the bosun's call, the high-pitched whistle used by mariners to give commands that can be heard over the roar of the sea. Evoking the eerie sounds of San Francisco’s maritime past, Hawkinson’s whimsical work employs elements of everyday transportation—shipping container, bus bellows, bicycle—to create a bass bosun's whistle, which is tuned three octaves lower than the traditional instrument. The shipping container, pitched vertically and installed over a hole in the deck of Pier 15, provides the lungs of the system. Tidal waters rise and fall in the container, compressing air and pushing it up into a giant bellows mounted above. The bellows, reclaimed from the pleated section of an articulated Muni bus, provides a steady source of pressurized air, which moves through a hose to the bicycle frame and there blows the bosun’s pipe. The airflow is controlled by a series of valves, levers, and other mechanisms that emulate a bosun’s hand and mouth motions to produce different sounds in the whistle. Cued by patterns cut into the tread of the bike's rear wheel, the bass bosun's pipe plays 21 different traditional calls including "Attention," "Carry On," "Swab the Deck," and "Pipe Down.”

00:02:52
The Exploratorium has been bringing solar eclipses to world-wide audiences via live broadcasts since 1998. We'll be on site again to capture the 2016 Total Solar Eclipse from the remote Micronesian island of Woleai. Join us live from Micronesia on March 8, 2016 at 5 p.m. PST either online or at the Exploratorium’s free event! www.exploratorium.edu/eclipse/ We’ll also be broadcasting the 2017 eclipse; Stay tuned for more details!

00:30:20
Recorded live at the Exploratorium in 2015. A noted foe of tooth decay, fluoride is added to most toothpaste, as well as our public water supply—a fact attacked by numerous conspiracy theories. Find out more about this controversial compound from Howard Pollick, Director of the Dental Public Health Residency Program at the University of California, San Francisco, and discover why elemental fluorine is considered to be completely dangerous, if not deadly.

00:24:26
Recorded live at the Exploratorium in 2015. Furiously reactive, fluorine has a ferocious appetite for attracting electrons from other elements, and a fearsome habit of killing chemists. Due to the strength of its bonds, fluorine is found almost exclusively in compounds such as the colorful mineral fluorite. Early attempts to isolate the element were met with injury and death from explosions, corrosive burns, and poisonous fumes. In 1886, the treacherous gas was at last isolated by Henri Moissan, whose innovative processes are still in use today.

00:53:27
Annual reception and presentation with Dennis M. Bartels, PhD; George Cogan, Chairman of the Board; and the Exploratorium's Board of Directors.

01:15:32
Leaders in their respective fields of science and medicine, Anne Wojcicki, cofounder and CEO of 23andMe, and her sister Janet Wojcicki, PhD, MPH, and professor at the University of California, San Francisco, join Exploratorium Director Dennis M. Bartels, PhD, for a stimulating conversation about their work and the evolution of the role of women in science, medicine, and technology.

00:00:40
A little over five years after initial construction on the Exploratorium's new home at Piers 15-17 began, the installation of a 24' x 60' floating dock off the south Apron of Pier 15 took place in early November. The dock will provide Pier access for water taxis in the San Francisco Bay. Timelapse video captures the last of the Exploratorium's original project construction.

00:27:47
Recorded live at the Exploratorium 2015. Earth, water, air, fire: our world is ruled by oxygen, the third most abundant element in the universe. Originating inside of stars, oxygen is scarce on planets outside our own. It comprises roughly half the mass of Earth’s crust and a fifth of its atmosphere. Nonmetallic and highly reactive, oxygen is key to combustion and corrosion, and forms stable bonds with almost every element, notably hydrogen (H2O) and itself.

00:14:27
Recorded live at the Exploratorium in 2015. Earth’s oxygen is produced in equal measure by terrestrial vegetation and microscopic life in the sea. Explore the profound influence of phytoplankton on the atmosphere with Exploratorium scientist Jennifer Frazier, and learn how their populations are changing along with our climate. Investigate oxygen’s physical properties and follow the history of its discovery, as well as its more breathtaking applications.

00:02:23
Science, history, and art converge in this whimsical tribute to San Francisco’s 1915 World’s Fair, which is celebrating its centennial this year. Lost landscapes from the Fair (including the Exploratorium’s former home, the Palace of Fine Arts) become the backdrop for spectral encounters. Are the spirits of fairgoers getting restless? Museum visitors who dared to enter the Black Box interacted with ethereal forces and became part of a world of ghostly apparitions that sprung to life. Just in time for Halloween, Visible Spectres took as its cue the illusion technique known as Pepper’s ghost, used in theaters, haunted houses, sideshows, and magic tricks. Do YOU see ghosts? Kerry Laitala is an award-winning moving-image artist who uses analog, digital, and hybrid forms to investigate the ways in which media influences culture. She considers this approach to making art as a type of media archeology. Laitala’s work resides at the crossroads of science, history, and technology. Her uncanny approach to evolving systems of belief manifests through an array of media including films, videos, installations, photographic works, performances, and kinetic sculpture. She studied photography and film at the Massachusetts College of Art and received her Master in Film from the San Francisco Art Institute. Laitala’s 2015 City Luminous series encompasses seven separate works (and counting), spanning the realms of installation, multi-projector performance, photography, and single-channel film, shown thus far at the Palace of Fine Arts, the San Francisco Art Institute, the California Historical Society, and in solo shows at Oddball Films and Shapeshifters Cinema. Elements of The City Luminous series have been funded by a Special Projects Grant from the Princess Grace Foundation, San Francisco Arts Commission Grant, Yerba Buena Benefit District grant, California Historical Society, and Maurice Kanbar.