The Shadow of the Past. Stories

Ivan Efremov (1908–1972) — Russian and Soviet science fiction writer, Doctor of Biological Sciences, scientist.
In this collection, you will encounter echoes of forgotten civilizations and mysteries of nature. The author's real expeditions turn into thrilling adventures: from the search for the tree of life and excavations of an ancient observatory to the meeting with Olgoi-Khorkhoi — the killer worm from Mongolian legends. The heroes of the stories are geologists, paleontologists, archaeologists — people who see in antiquity not just museum exhibits, but keys to understanding our place in the Universe.