Editor's note: A treasure trove of Paleolithic art, the Lascaux caves were closed to visitors in 1963 in order to better preserve the ancient images. Internet to the rescue! As you browse this collection, think about the artists who decided to take time out from hunting, gathering, and general survival to depict the large mammals that must have been important to them. What would you draw, if you wanted someone 20,000 years from now to receive your message? Imagine! And enjoy these stunning Lascaux wallpapers.