Clever orangutans have mastered the art of building

New research suggests that orangutans may be even smarter than we thought -- and we already thought they were pretty clever. Adam van Casteren, a scientist at the University of Manchester in the U.K., has found that skilled orangutans build incredibly sophisticated nests in trees between 37 and 66 feet off the ground and typically make use of advanced engineering techniques. Larger branches are positioned to support the nest, while smaller, thinner branches form "mattresses." They'll even use leaves as "blankets" and weave branches above the nest to form a roof. At the least, they're probably better at building structures than the last few seasons of "Survivor" contestants have been.