The World's Clark Boyd reports that Japan's troubles with its quake-damaged nuclear reactors are prompting European leaders to reassess the safety of their own reactors, and Europe's reliance on nuclear energy in the future.
The Geo Quiz is looking for a square that's closely identified with a revolution. Not Tahrir Square, in Cairo - the one we want you to name is in Prague and it's associated with the 1989 Velvet Revolution.
A tourism organization in Prague has come up with a new spin on the usual walking tour of the city. Pragulic, a combination of Prague and the Czech word for "streets" employs homeless people living in the capital as guides.