Showing results for "Planets" in 20th Century

The world is filled with mysteries, and even in the modern age, much of the planet remains unexplored. The depths of the oceans and the intricate and extensive cave systems that honeycomb some parts of the Earth are still largely unknown. Thus, it should come as no surprise that when it comes to this terra incognita, people have projected all sorts of ideas. Tales of sunken cities or lost civilizations are just some of the fanciful theories, and those could even be considered tame in comparison to the idea that Earth is flat and/or hollow.

A fascinating piece of historical scientific writing, written in 1913 by E. Walter Maunder (F.R.A.S.), the superintendent of the Solar Dept. at the Royal Observatory in Greenwich. The book is a snapshot in time showing the evolution of thinking on the solar system and cosmology. The author considers, in fine detail, the plausibility of life on other planets within our solar system, the requirements for such life, and the barriers that life faces.