2019 Moonbeam Silver Medal Many thousands of years ago, when a sheet of ice up to a mile thick began to let go of the land, the Atlantic Ocean flooded great valleys that had been scooped out by glaciers, and the salty waves of an inland sea lapped the green hills of Vermont. Into this arm of the sea swam Charlotte. Her milky, smooth, muscled body sliced slowly through the water like scissors through silk. Like a chirping canary,...