Named after the benevolent Indian spirit Yuquiyu, El Yunque is the only rainforest in the U.S. National Forest System. Comprised of some 240 different species of trees, it is actually a series of forests, each one determined by its altitude. El Toro, the highest peak in the forest at 3,532 feet, has only odd dwarf vegetation clinging to its sides. Explore More>>
Have you ever wondered how a simple shot can keep you from dying a horrible death? In this one-minute video, Ask Smithsonian’s host, Eric Schulze, unravels how vaccines boot-camp our bodies into shape, getting us ready to fight off deadly diseases.