I mean, water carved this cathedral out of nothing. DR DAVE THAYER: Yep. MICHIO KAKU: And how long has this erosion been taking place? DR DAVE THAYER: Well at least 5.5 million years is what they say.

Here at the Burning Gap, in East Sussex, coastal erosion is a really big deal ... we send it to a local company who water-jet them. So we get this really nice clean drilled hole.