Title: On the Origin of Species.
Question: What does Darwin say can explain diverse feature such as antlers on deer and bright feathers on certain male birds?

Title: 2008 Summer Olympics torch relay.
Question: What is the name of the Syrian actress who was one to bear the torch?

Title: Guam.
Question: What posses some challenges for the Chamorros who find it hard to keep their culture?

Title: BeiDou Navigation Satellite System.
Question:
What is the name of the second generation of BDS?