I could never forget this image on a screen: an airplane icon marks a curve between two places, with the Bering Strait almost at its midpoint. Saying that edge is the Bering Strait might be wrong, but conversely may be true, that the Bering Strait is some sort of edge. Millions of years ago, there was Beringia, a bridge that connected two continents, mammals migrated to the other side. Years later, sea level rose and flooded the bridge, lands broke off, boundary arose, and mammals never returned. Rumors still tell that people crossed the Bering Strait without boat or plane. I guess they’ve learned the secret of the edge. Travel through this edge, night may not follow day, while today may go back to yesterday. It’s always been.