BBC Knowledge Magazine was a magazine covering science, nature and history which was launched in 2008; it closed in November 2012. The magazine's now-defunct website described it thus:
BBC Knowledge Magazine - the new magazine about science, nature and history...invention, innovation and more. Sir Francis Bacon was right about knowledge. It is power. Ben Franklin agreed, "An investment in knowledge always pays the best interest."
The magazine appears to be restarted and is available in select countries as per this site: 
The magazine was chosen as one of the top ten magazines launched in 2008 by Library Journal.