Prince William, left, and his wife Kate, the Duke and Duchess of Cambridge walk through the rainforest in Danum Valley Research Center in Danum Valley, Sabab, Malaysia, Saturday, Sept. 15, 2012. (AP ... more 

Prince William, left, and his wife Kate, the Duke and Duchess of Cambridge walk through the rainforest in Danum Valley Research Center in Danum Valley, Sabab, Malaysia, Saturday, Sept. 15, 2012. (AP Photo/ Vincent Thian, Pool) less