FIG. 1: Athanasius Kircher. Mundus Subterraneus, quo universae denique naturae divitiae, 1664. Illustration of underground fire canals. Courtesy: © Wikimedia Commons

FIG. 1: Athanasius Kircher. Mundus Subterraneus, quo universae denique naturae divitiae, 1664. Illustration of underground fire canals. Courtesy: © Wikimedia Commons

Athanasius Kircher. Mundus Subterraneus, quo universae denique naturae divitiae, 1664. Illustration of underground fire canals. Courtesy: © Wikimedia Commons

03 Mar 2020