Join volunteer Steffan Bartschat on a hike up the Marincello trail and learn about the history of the planned Marincello development while exploring the natural wonders of the Marin Headlands.

Could you imagine living in Tennessee Valley? Think about the trails we walk and hike could have been filled with cars and homes.

All ages will delight in learning about flora, fauna, and tales of San Francisco through masterful storytelling from your local National Park Service Ranger.

All ages will delight in learning about flora, fauna, and tales of San Francisco through masterful storytelling from your local National Park Service Ranger.

Stroll through an old-growth redwood forest, hear tall tales, soar in the sounds and smells, and hear the historical and ecological story of Muir Woods.

Advances in recent decades have allowed amateur astronomers to produce deep space and planetary pictures that rival those taken by professional observatories. This presentation will provide an overview of off-the-shelf instruments and methods anyone, with perseverance and patience, can use to take amazing astronomical images.

Galileo Galilei developed a new method for reliably comprehending the world around us and, accordingly, has been called the father of modern science. We will learn how Galileo‰ЫЄs celestial observations dramatically changed our understanding of the universe and our place in it.

Discoveries by NASA‰ЫЄs Kepler Mission suggest there are billions of potentially habitable worlds in the Milky Way galaxy. What has the study of planets within and beyond the Solar System taught us about our own planet Earth? And what‰ЫЄs next in the search for life beyond the Solar System?

Much of what we think we know about space comes from film and television, but Hollywood‰ЫЄs job is more often to entertain than to educate. In this presentation, we will sort fact from fiction, taking a tour through the worlds of Star Trek, Star Wars, and much more.

Do you ever wish we could look back in time? We can, by studying the cosmic microwave background (CMB), which reveals the fiery early universe when it was only 0.003% of its present age. This talk will show how studying the CMB allows us to learn about the origin, composition, and ultimate fate of the universe.