I wrote about these weird and wonderful caves ages ago. Years ago in fact. And finally someone has gotten inside them with a decent camera to have a good explore. The BBC are showing How The Earth Made Us tonight at 9pm on BBC2. If you’re outside the UK, you’ll either just have to wait months, if not years, for it to appear on BBC Entertainment/World. Or work out how to get it through BitTorrent.Vodpod videos no longer available.