A Little History of the World No.5.

Ever wondered why Monday is called Monday or Saturday is called Saturday? Well, that was decided by the Babylonians more than 4,000 years ago. And the answer is right above your head.

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Do you remember what you were doing exactly one year ago on 21st March 2013? It probably seemed like an ordinary day. Did you feel any older? Maybe you should have, because that was the day the universe aged - a lot. Scientists working on the European Space Agency’s Planck Satellite project, studying the earliest moments of the Big Bang, realised our calculation for the age of the universe was off a little.