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 magnesium
I 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.