“A human being weighing 70 kilograms contains among other things:-45 litres of water-Enough chalk to whiten a chicken pen-Enough phosphorus for 2,200 matches-Enough fat to make approximately 70 bars of soap-Enough iron to make a two inch nail-Enough carbon for 9,000 pencil points-A spoonful of magnesiumI weigh more than 70 kilograms.And I remember a TV series called Cosmos. Carl Sagan would walk around on a set that was meant to look like space, speaking in large numbers. On one of the shows he sat in front of a tank full of all the substances human beings are made of. He stirred the tank with a stick wondering if he would be able to create life.He didn’t succeed.”