According to Vernadsky, all living things on Earth make up the biosphere—a kind of planetary shell in which an endless cycle of matter and energy takes place. However, with the appearance of humankind and its unprecedented-scale influence on the planet, a new geological epoch begins, and the biosphere transitions into a new state, transforming into the "sphere of reason"—the noosphere.
How does the biosphere transform into the noosphere? What role do global communication systems play, the development of new sources of energy, the strengthening of international cultural and political ties, and the expansion of humankind and the biosphere beyond Earth into space?
Vernadsky himself sought throughout his life to "understand what surrounds us," and his works allow us to learn more about Earth—its present and future—inseparably connected with humanity, with its deeds and thoughts.