A UN World Heritage site that no tourist will ever set foot on, Iceland’s Surtsey is a fresh geologic creation reserved for research.
The Interior Department considers a proposal to lift a 25-year ban on concealed weapons in national parks.
Blaze near Yosemite, mostly under control, shows limits to the parks' 'let it burn' policy.
A world free from predators would not be idyllic.
With wolves’ numbers rising, federal government – and many in West – want to take them off endangered species list. Environmentalists warn that it’s too soon.
The lander is scheduled to touch down on the red planet Sunday, marking a turning point in the exploration program.
Steve Gehman and Betsy Robinson brave frostbite, avalanches, and bears to track the imperiled animal in the northern Rockies.