
A look at some of history's most notable thinkers and innovators.

Richmann's lightning experiment ends in tragedy, warning future physicists; Slotin's atomic research at the Manhattan Project also comes with fatal consequences; Rodney Marks studies star formations in Antarctica.

Scheele's unsafe experiments led to key discoveries; Franklin's DNA photo sparked a revolution but was ignored; at 24, Ball developed a leprosy treatment, breaking barriers for women in science while advancing chemistry.