Who is fidel castro?

a.) the longest serving head of the organization of american states

b.) the leader of the first venezuelan oil cartel

c.) the first secretary general of the united nations

d.) the revolutionary leader of cuba for over four decades

john smith was the first englishman to sail around the world. francis bacon served as attorney general and lord chancellor of england. he took up aristotelian ideas, arguing for an empirical, inductive approach, known as the scientific method, which is the foundation of modern scientific inquiry.