Wartime penicillin's biggest secret was "hidden in plain sight", on the pages of the very first article on penicillin

The real reason why the tortoise Henry Dawson, despite starting almost three years late, beat the hare Howard Florey to become the first ever to put an injection of an antibiotic into a human patient, is to be found inside wartime penicillin's biggest secret.

Unexpectedly, wartime penicillin's biggest secret was not stamped "TOP SECRET" and was not buried under lock and key in some government cabinet in Washington or London.