3. 8. Your appendix might not be a useless evolutionary byproduct after all. Unlike your wisdom teeth, your appendix might actually be serving an important biological function - and one that our species isn't ready to give up just yet.
4. The Nobel Prize in physiology or medicine was awarded to a cellular-level experiment.
5. Obama defeated Romney in a series of key swing states despite a weak economic recovery and persistent high unemployment as U.S. voters decided between two starkly different visions for the country。
6. Talk show host and comedian Ellen DeGeneres will host the Oscars ceremony for a second time.