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The lure of Terra Australis Incognita begins with the Ancient Greeks and ends with modern cruise ships.
Four times over 100-plus years, major initiatives have brought together scientists from around the globe to collaboratively study the poles.
Walk in the shoes of Dean Hudson. As a visually impaired person, Dean depends on audio clues to navigate through the world.
Did you know the Maya used two calendars? How did they know when to plan their big New Year's parties?
Stand outside on a sunny day with a watch in your hand, and you can tell which way is north.
The more astronomy changes, the more it stays the same. This series of images juxtaposes ancient and modern study of the celestial bodies.
Imagine yourself in the middle of the vast Pacific Ocean. You've been sailing for weeks, and there's no land in sight. Do you know where you are? Do you know which way to go?
(Embarcadero at Green Street)
San Francisco, CA 94111
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