Man captures rare close-up footage of an iceberg collapsing Capturing an iceberg collapsing or calving is a rare sight, and this couple filming off Labrador, Canada, picked up their camcorder just in time to catch the dramatic event. The pair and their dog are clearly excited about what they've just witnessed, but are soon chased away by a rush of smashed up ice that starts floating towards them. For ...

For life to prosper water is a fundamental necessity, but if so, how did the the ancient Maya build such a massive empire without a river to draw water from? This, the first of five videos from the BBC documentary Secrets of the Mayan Underworld, demonstrates how through a series of underground, water-filled caves that run under the majority of the Yucatan, the Mayan Underworld – contrary to their belief that it was a realm of spirits – was actually the life-source of the entire area....