A look at some of the various ways in which, throughout history, humans have lived with, worked with, and interacted with animals - from the very first socialising with wolves thousands of years ago through to farting fish almost starting a nuclear war in more recent history! We take a trip to Elizabeth I's menagerie which was housed at the Tower of London and home to exotic animal gifts from foreign rulers, and included wolves, hyenas, bears, leopards and even lions. There were also some nice dogs but, well, leopards. Sophie and Sebastian are on hand to advise both Alexander the Great and King Porus as to which animals they could use in battle to defeat their enemies, seemingly ignoring the fact that Alexander and Porus are actually fighting each other. Elsewhere, the Australian army faces the unruly might of an emu invasion, Romans release an album in praise of their favourite pet (eels), and Charles Darwin hosts Yummy Planet, a look at some of the animals he actually ate whilst on his travels. Plus, we take a look at how humans have used animal by-products in different ways, including drinking milk and the Victorian penchant for 'coprolite' - jewellery made from fossilised dinosaur poo