Challenge #19 Stumper: Very many scientific discoveries are made by 'accident'. That is, the discovery is made during investigations that are not related to what is discovered. Which of the following discoveries was made by a scientist who was purposefully and persistently seeking it? X-rays Antimicrobial action of penicillin The anticoagulant heparin All three were discovered by chance None of the three was discovered by chance. Stumper Answer: d) All three were discovered by chance Correct answer received from: Stacia, cooo., razpitou, Orion X., Jeyprakash, ken F., Jason Coffer, goop, emma, Rachel S.,