Seeing what was happening in biology while the Industrial Revolution was peaking in engineering.
Before diving deeper into acquisition, we must address the "PDF verified" search intent. Asimov’s Chronology of Science and Discovery is technically still under copyright. The Asimov estate and publisher HarperCollins have not released it into the public domain.
: Published originally in 1989 (with updates through 1993), some entries may contain errors or outdated facts that have since been corrected by newer research. Asimov's Chronology of Science & Discovery - Amazon