You can enroll in courses that bring together pairs of professors representing different disciplines, who model how looking at a problem from divergent perspectives can lead to new insights
Um, then there's a London trip on the 16th of February and we'll be taking a medium-sized coach so there'll be 45 places on that and let's see the optional extra is the Tower of London.
We also have a bunch of things in the open world that you can do where you can discover some new storylines that aren't part of the main story that are optional.
In the United States, two physicians are required to conduct the brain death test six hours apart before declaring death, but confirmatory tests are optional.