Some people may wonder why we in the Northern Hemisphere have our spring and summer when our planet is far away from thesun. (Equally confusing: our fall and winter come when we are neartothesun.) Shouldn't proximity to that nice warm ball of sunshine predict our seasons?
The social network, freshly moved in tothe former Sun Microsystems campus nearthe Dumbarton Bridge on the edge of San Francisco Bay, has begun making plans to add a second campus on the inland side of Bayfront Expressway.