Named in memory of the well-known Flemish philosopher Leo Apostel (1925–1995). He was a pupil of Chaim Perelman (Brussels), Jean Piaget (Geneva) and Rudolf Carnap (Chicago). In 1956–57 he joined the universities of Brussels and Ghent, teaching logic and epistemology there for many years. In 1990 he established the independent interdisciplinary investigation center, Worldviews, in which the discoverer has been asked to guide the group “cosmology”. (M 27129) _ _.