Four Russian scientists, four prominent figures in the field of natural sciences:

a) the "late" Homo Universalis Mikhail Lomonosov, after whom Moscow University is named,

b) the pioneering mathematician of non-Euclidean geometry, which opened the way for space, Nikolai Lobachevsky,

c) the well-known chemist Dmitri Mendeleev, famous from our school years for his periodic table, and

d) the self-taught scientist, inventor, and designer Konstantin Tsiolkovsky, the father of astronautics.

An overview of their lives, science, the fields in which they operated, and their surroundings, for a broader audience that has not delved deeply into these sciences.