1) Mass Extinction of species on the Earth is examined. While we know of the Permian Dinosaur killer asteroid, we don't know the reason for at least four more known mass extinctions.
2) 1918 Flu was the largest killer of any bug. Scientists now study the different flu DNA and their transmission methods.
3) Papyrus was the primary way we can learn about the ancient past. New methods of mufti-spectrum lighting helps us read previously unreadable texts.
4) Cynthia Breazeal is profiled as the creator of robots designed for easy interfacing with humans.