The father of the Gaia hypothesis shares his greatest invention

2019-03-02 09:20:01

Nick Ansell/PA IN 1957, I invented a device that can sniff out poisonous pesticides and ozone-eating compounds at concentrations of just one part per trillion. The electron capture detector, as I called it, boasted a level of sensitivity unheard of at the time and never bettered since. I made the first one myself on a lab bench. I’m not sure it could happen that way now. For a start, I was working in a government lab in Mill Hill, north London,