[dropcap]F[/dropcap]ifteen miles inland from the frozen coast of the Arctic Ocean, Teshekpuk Lake is one of the largest freshwater bodies in Alaska. On its northern shoreline are sandy bluffs that hold fossils of walrus, ringed seals and beluga. Thousands of years ago, this shore was an ocean beach. Digging into that beach in the middle […]
Many years ago, geologists stood on the bank of the Copper River and watched Childs Glacier thunder icebergs straight into the river. Using a little imagination, one researcher remarked how an advance of the glacier could seal off the big river. He envisioned a process that has happened many times in the world and is […]
