Daily cycles of the city are projected onto a miniature topographic map of San Francisco.

Your dilemma: Play for yourself—or for the group?

Explainers do social interaction demonstrations.

Discuss your interpretations of these words and images.

Even randomly formed groups can generate instant rivalries.

Do you trust your partner—or wind up all wet?

See how fast you can assign words to categories–then switch sides and try it again.

Keep your herd alive—with a little help (maybe) from your friends.

Work together to stay alive and rack up points.

How are people using this shared resource?