Now... sharpening spears, skinning animals and flint-knapping may not be regular past times for you and me but they are for Will Lord.
He's an archaeologist from Rougham in Suffolk who spends much of his working life dressed as a caveman - in his back garden.
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Professor Paul Ramchandani has been taken on at the University of Cambridge to "examine the importance of play in education".
It will be a breezier day than recently but it will be dry again and hot.
Students from a Milton Keynes school want to turn a derelict building into a community hub - and get some work experience along the way.