YouTube Saturday - 7 Billion

The Earth's human population is due to exceed 7 Billion by the end of 2011. Here is a brilliant short animated video highlighting the world's population explosion since the 1800's (when the population was 1 billion). The video is produced by National Geographic, which are running a special series of articles entitle "7 Billion" - click here to find out more and read their cover article from the January edition.