Built initially to help deal with the floods that regularly threatened the city, it now co-ordinates 30 government agencies and provides mobile applications to keep citizens in touch with potential accidents, traffic black-spots and other city updates.

BBC: How will our future cities look?

Now, astronomers have scoured one of the few suspected hiding spots for medium-sized black holes in a globular cluster, and conclude they are rare or nonexistent.

MSN: Existence of middleweight black holes nearly ruled out

This lush, green-black volcanic island is considered Italy's diving paradise, with 40 spots on the country's first protected marine reserve.

WSJ: Dive, Dive, Dive off Italy's Coast