"I've been lucky enough to film with elephants, gorillas, bears and none of them have ever sat on my head."
Magic Meerkat Moments: In this clip from BBC's Planet Earth Live, we get to see meerkats, which have become so acclimated to film crews that they now view them as part of the landscape and use them for shade and as vantage points. [via]
In this three part series from the BBC, Professor Jim Al-Khalili discusses the history of the elements. [more inside]