The expedition leader, Donald B. MacMillan, wrote that his dogsled team “covered 180 miles in five days, worked hard every day and did not receive one ounce of food.”
After centuries of moving through the Irish countryside, a group known as Travellers has come to rest.
Algae, plants and humans: three groups of organisms that used chemistry to change the planet.
Peaks protected fifty years ago by the Wilderness Act no longer keep mountain goats safe from human impact.
By the 1920s, California had lost all of its grizzly bears—once considered a distinct species and an emblem of the state.