Guardian: The LC-130 Hercules flew low over the ice sheet in a tight grid pattern, Teflon-coated landing skis barely 300 meters above the soft upper layer of snow. At the rear of the plane, scientists clustered round a monitor displaying a regular pattern of dark red waves generated by a radar signal.
Somewhere in the vast, white emptiness below were two tiny cracks -- barely 4 inches across -- imperceptible to the naked eye from this altitude, especially beneath fresh snow.
But the cracks ran across...