Penicillin nontoxic in humans by first performing toxicity tests in animals and then on humans. His subsequent experiments on penicillin's response to heat and pH allowed Fleming to increase the stability of the compound. The one test that modern scientists would find missing from his work was the test of penicillin on an infected animal, the results of which would likely have sparked great interest in penicillin and sped its development by almost a decade. The importance of his work has been recognized by the placement of an International Historic Chemical Landmark at the Alexander Fleming Laboratory Museum in London on
Saint Valentine of the emperor Claudius and secretly married couples so that the husbands wouldn't have to go to war. The legend claims that soldiers were sparse at this time so this was a big inconvenience to the emperor. Another legend is that Valentine refused to sacrifice to pagan gods. Being imprisoned for this, Valentine gave his testimony in prison and through his prayers healed the jailer's daughter who was suffering from blindness. On the day of his execution he left her a note that was signed, "Your Valentine". Saint Valentine was not exceptionally more venerated than other saints and it seems