The secrets of a 2,000-year-old burnt scroll
The ancient scroll, which looks like a lump of charcoal, was charred by the volcanic eruption of Mount Vesuvius in 79AD. It's ...
BBC20h
Earth and space: Video playlist
The Earth completes one rotation every 24 hours to give us day and night. When Britain faces the Sun it is daytime, but the other side of the world is in darkness. So in Australia it is the middle ...