The boundaries of Europe's constituent countries have changed a lot in my lifetime. Some countries don't exist anymore whilst others have come into existence. But it takes a map visualisation to make you realise just how much the map of Europe has changed.

Actually, it takes two map visualisations. The first, courtesy of the BBC, dates from 2005 and covers the years between 1900 and 1994. Starting wit Imperial Europe and fast forwarding though two world wars, plus the Cold War and taking in the collapse of the Communist Bloc and the expansion of the European Union.

As a race and as a society we just love our boundaries and our borders; go here, don't go here, this is yours, this is ours. We put up border controls, we tax dependent on what side of the street you live on, you need the right visa stamp in your passport to pass onto this piece of land, which looks identical to the one you're currently standing on but because of a line drawn on a map its ... different.

While lots of the animal kingdom are equally territorial, no one species has managed to invent a whole series of rules and regulations and to employe an entire bureaucracy to ensure the rules and regulations are correctly implemented and patrolled.