Look up in the sky, it’s a bird, it’s a plane no it’s a living roof. Not just a Green roof with scattered plants but one covered with 1.7 million native plants. Architect Renzo Piano designed the roof as an homage to the hills of SF. Even more creative is how the plants keep from slip sliding off the hills. Rana Creek worked with Piano to use 50,000 porous, biodegradable trays (called a BioTray®), that they made from tree sap and coconut husks as containers for the vegetation to keep the little green guys in place.

In addition to the natural habitat created by the roof, the roof reduces the Urban Heat Island effect and reduces the building’s temperature by an average of 10 degrees versus a nasty old standard roof. Additionally, the roof’s cistern system will captures 90-98 percent rainwater, with 3.5 million gallons of rainwater per year expected to be absorbed by the roof.

With all the time we spent outside the museum it’s a wonder we didn’t get sunburned. But of course we used sustainably concocted sunscreen. Next museum post, we’ll take a green look at the interior.

A modern planetarium is an especially terrific asset for the country, as evidence from many of Peru’s archaeological sites suggest that ancient Peruvian peoples used the stars above and our solar system to their benefit. Examples of places where these observations occurred include Machu Picchu and also the site of Chankillo, which is thought to be the site of the most ancient solar observatory in the Americas. Now the people of today’s Peru can also use a special tool to learn about what happens in the skies above.

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