It's hard to believe summer's almost over. But with the fall lodging deals starting to arrive, you know it must be true. If you've always wanted to visit Sequoia National Park in the fall, this might be the perfect opportunity.

A newly discovered "hot spot" has led to temporary closure of the Clear Lake Trail in Yellowstone National Park, but elsewhere in the park completed repairs have allowed officials to reopen three other trails.

Caribou have been on the landscape for more than 400,000 years. For roughly the past 12,000 years, they have been hunted by humans — first the paleo-Indians, now the First Nations’ cultures along with many other Alaskans. Resilience to hunting, to weather, and to predators has enabled the caribou to remain an integral part of both the natural landscape and the human culture. The greatest test of their resilience, though, stands to be climate change.