Earth
Histories: Now you see it, now you don't
In the autumn of 1879, a canoe crept into a remote Alaskan bay. After days of rain, the weather had relented, revealing spectacle after spectacle: towering mountains, green waters and icebergs sparkling like "the jewel-paved streets of the New Jerusalem". Most impressive of all were the glaciers, fed by distant heights and flowing far into …