National Geographic magazine, long known for its educational maps and writing that is easily understood by a variety of readers, has added a feature to its Website. The first, Earthpulse, sponsored by Ford Motors, covers environmental conservation issues with features that change monthly. This month, readers can learn more about "humans and habitats," with an article on the state of the Penan culture of the rainforest in Borneo, a map of the most endangered regions of the globe, and an audio cast from the Arctic about the Gwich'in peoples and caribou migrations (RealAudio). Other resources available from Earthpulse include lesson plans and links to previous months' features.