For Abraham Lincoln's birthday, we look at one of the most timeless memorials to the 16th president - or at least its undercroft, which has been out of public view for a long time.
The Great Green Wall is a multi-country project in and around Africa’s Sahel region to re-green areas that have turned to desert because of overuse, expanding desert and climate change.
On this day in 1948, Idaho Fish and Game moved beavers to a new habitat in a very unusual way: they had the beavers parachute into the wilderness! We'll explain how they did it.